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Physics Honors – Midterm Review Questions
1.
A car travels 90 km/h. How long does it take for it to travel 400 km?
a. 4.1 h
b. 4.2 h
c. 4.3 h
d. 4.4 h
2.
A polar bear starts at the North pole. It travels 1.0 km South, then 1.0 km East, then 1.0
km North to return to its starting point. This trip takes 30 min. What was the bear's
average speed?
a. 0 km/h
b. 0.10 km/h
c. 3.0 km/h
d. 6.0 km/h
3.
A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average
speed of the motorist for this trip?
a. 84 km/h
b. 89 km/h
c. 90 km/h
d. 91 km/h
4.
An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for 750 miles.
What is the average speed for the trip?
a. 260 mi/h
b. 270 mi/h
c. 275 mi/h
d. 280 mi/h
5.
A new car manufacturer advertises that their car can go "from zero to sixty in 8 s". This is
a description of
a. average speed.
b. instantaneous speed.
c. average acceleration.
d. instantaneous acceleration.
6.
Can an object's velocity change direction when its acceleration is constant?
a. No, this is not possible because it is always speeding up.
b. No, this is not possible because it is always speeding up or always slowing down, but
it can never turn around.
c. Yes, this is possible, and a rock thrown straight up is an example.
d. Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and
then backs up is an example.
7.
A cart starts from rest and accelerates at 4.0 m/s2 for 5.0 s, then maintain that velocity for
10 s, and then decelerates at the rate of 2.0 m/s2 for 4.0 s. What is the final speed of the
car?
a. 20 m/s
b. 16 m/s
c. 12 m/s
d. 10 m/s
2
8.
The metric prefix for one thousand is
a. milli
b. centi
c. kilo
d. mega
9.
Fifty milligrams is
a. 0.000050 g
b. 0.00050 g
c. 0.050 g
d. 50000 g
10.
An average human has a heart rate of 70 beats per minute. If someone's heart beats at
that average rate over a 70-yr lifetime, how many times would it beat?
a. 7.4 x 105
b. 2.2 x 106
c. 1.8 x 107
d. 2.6 x 109
11.
You are driving home on a weekend from school at 55 mi/h for 110 miles. It then starts to
snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes.
How far is your hometown from school?
a. 180 mi
b. 190 mi
c. 200 mi
d. 210 mi
12.
An object moving in the +x axis experiences an acceleration of 5.0 m/s2. This means the
object is
a. traveling at 2.0 m in every second.
b. traveling at 5.0 m/s in every second.
c. changing its velocity by 5.0 m/s.
d. increasing its velocity by 5.0 m/s in every second.
13.
A bullet moving horizontally with a speed of 500 m/s strikes a sandbag and penetrates a
distance of 10.0 cm. What is the average acceleration, in m/s2, of the bullet?
a. 1.25X106
b. 2.50X106
c. 1.25X103
d. 2.50X103
14.
A jet fighter plane is launched from a catapult on an aircraft carrier. It reaches a speed of
42 m/s at the end of the catapult, and this requires 2.0 s. Assuming the acceleration is
constant, what is the length of the catapult?
a. 16 m
b. 24 m
c. 42 m
d. 84 m
3
15.
A car starts from rest and accelerates uniformly at 3.0 m/s2. A second car starts from rest
6.0 s later at the same point and accelerates uniformly at 5.0 m/s2. How long does it take
the second car to overtake the first car?
a. 12 s
b. 19 s
c. 21 s
d. 24 s
16.
A car goes from 40 m/s to 80 m/s in a distance of 200 m. What is its average
acceleration?
a. 8.0 m/s2
b. 9.6 m/s2
c. 12 m/s2
d. 24 m/s2
17.
An object is moving with constant non-zero acceleration in the +x axis. The position
versus time graph of this object is
a. a horizontal straight line.
b. a vertical straight line.
c. a straight line making an angle with the time axis.
d. a parabolic curve.
18.
An object is moving with constant non-zero acceleration in the +x axis. The velocity
versus time graph of this object is
a. a horizontal straight line.
b. a vertical straight line.
c. a straight line making an angle with the time axis.
d. a parabolic curve.
19.
A ball is thrown straight up, reaches a maximum height, then falls to its initial height. As
the ball is coming down,
a. both its velocity and its acceleration point upward.
b. its velocity points upward and its acceleration points downward.
c. its velocity points downward and its acceleration points upward.
d. both its velocity and its acceleration point downward.
20.
An object is thrown upward with a speed of 14 m/s on the surface of planet X where the
acceleration due to gravity is 3.5 m/s2. What is the maximum height reached by the
object?
a. 7.0 m
b. 10 m
c. 14 m
d. 28 m
21.
A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.00 s?
a. 9.8 m/s upward.
b. 9.8 m/s downward.
c. zero
d. 19.6 downward.
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22.
A ball is thrown straight up. What is its acceleration just before it reaches its highest
point?
a. zero
b. slightly less than g
c. exactly g
d. slightly greater than g
23.
Ball A is dropped from the top of a building. One second later, ball B is dropped from the
same building. As time progresses, the distance between them
a. increases.
b. remains constant.
c. decreases.
d. cannot be determined from the information given.
24.
Two objects are thrown from the top of a tall building. One is thrown up, and the other is
thrown down, both with the same initial speed. What are their speeds when they hit the
street?
a. The one thrown up is traveling faster.
b. The one thrown down is traveling faster.
c. They are traveling at the same speed.
d. It is impossible to tell because the height of the building is not given.
25.
A ball is thrown straight up with an initial speed of 30 m/s. What is its speed after 4.2 s?
a. 11 m/s
b. 30 m/s
c. 42 m/s
d. 72 m/s
26.
The slope of a position versus time graph gives
a. position
b. velocity
c. acceleration
d. displacement
27.
The area under a curve in an acceleration versus time graph gives
a. acceleration
b. velocity
c. displacement
d. position
28. In the graph shown, what is the velocity at t = 4.0 s?
a. 0
b. 10 m/s
c. 20 m/s
d. -40 m/s
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29.
In the graph shown below, what is the average velocity from 0 to 4.0 s?
a. 0
b. 10 m/s
c. 20 m/s
d. -40 m/s
30.
If the position versus time graph of an object is a horizontal line, the object is
a. moving with constant non-zero speed.
b. moving with constant non-zero acceleration.
c. at rest.
d. moving with infinite speed.
31.
A net force F accelerates a mass m with an acceleration a. If the same net force is
applied to mass 2m, then the acceleration will be
a. 4a
b. 2a
c. a/2
d. a/4
32.
A 20-ton truck collides with a 1500-lb car and causes a lot of damage to the car. Since a
lot of damage is done on the car
a. the force on the truck is greater then the force on the car.
b. the force on the truck is equal to the force on the car.
c. the force on the truck is smaller than the force on the car.
d. the truck did not slow down during the collision.
33.
When you sit on a chair, the resultant force on you is
a. zero.
b. up.
c. down.
d. depending on your weight.
34.
A golf club hits a golf ball with a force of 2400 N. The golf ball hits the club with a force
a. slightly less than 2400 N.
b. exactly 2400 N.
c. slightly more than 2400 N.
d. close to 0 N.
35.
A 20 N weight and a 5.0 N weight are dropped simultaneously from the same height.
Ignore air resistance. What happens, and why?
a. The 20 N weight accelerates faster because it is heavier.
b. The 20 N weight accelerates faster because it has more inertia.
c. The 5.0 N weight accelerates faster because it has a smaller mass.
d. They both accelerate at the same rate because they have the same weight to mass
ratio.
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36.
An object of mass m is thrown straight up. At its highest point, the net force on it is
a. greater than mg.
b. mg.
c. less than mg, but greater than zero.
d. zero.
37.
A rocket moves through empty space in a straight line with constant speed. It is far from
the gravitational effect of any star or planet.
Under these conditions, the force that must be applied to the rocket in order to sustain its
motion is
a. equal to its weight.
b. equal to its mass.
c. dependent on how fast it is moving.
d. zero.
38.
If you push a 4.0-kg mass with the same force that you push a 10-kg mass from rest,
a. the 10-kg mass accelerates 2.5 times faster than the 4.0-kg mass.
b. the 4.0-kg mass accelerates 2.5 times faster than the 10-kg mass.
c. both masses accelerate at the same rate.
d. none of the above is true.
39.
A net force F acts on a mass m and produces an acceleration a. What acceleration
results if a net force 2F acts on mass 4m?
a. 8a
b. 4a
c. 2a
d. a/2
40.
A person of weight 480 N stands on a scale in an elevator. What will the scale be reading
when the elevator is accelerating upward at 4.00 m/s2?
a. 480 N
b. 676 N
c. 284 N
d. 196 N
41.
A person on a scale rides in an elevator. If the mass of the person is 60.0 kg and the
elevator accelerates downward with an acceleration of 4.90 m/s2, what is the reading on
the scale?
a. 147 N
b. 294 N
c. 588 N
d. 882 N
42.
A person on a scale rides in an elevator. If the mass of the person is 60.0 kg and the
elevator accelerates upward with an acceleration of 4.90 m/s2, what is the reading on the
scale?
a. 147 N
b. 294 N
c. 588 N
d. 882 N
7
43.
In the Atwood machine shown, if M = 0.60 kg and m = 0.40 kg, what is the magnitude of
the acceleration of the system? (Ignore friction and the mass of the pulley.)
a. 5.3 m/s2
b. 4.5 m/s2
c. 0.89 m/s2
d. 1.2 m/s2
44.
Two boxes of masses m and 2m are connected by a rope. If the forward force on the
more massive box is F, what is the tension in the connecting rope?
a. 3F
b. F
c. F/2
d. F/3
45.
An antitank weapon fires a 3.00-kg rocket which acquires a speed of 50.0 m/s after
traveling 90.0 cm down a launching tube. Assuming the rocket was accelerated uniformly,
what is the average force acted on it?
a. 4.17X103 N
b. 3.62X103 N
c. 2.82X103 N
d. 2.00X103 N
46.
An object slides on a level surface in the +x direction. It slows and comes to a stop with a
constant acceleration of -2.45 m/s2. What is the coefficient of kinetic friction between the
object and the floor?
a. 0.25
b. 0.50
c. 4.9
d. Impossible to determine without knowing the mass of the object.
47.
During the investigation of a traffic accident, police find skid marks 90.0 m long. They
determine the coefficient of friction between the car's tires and the roadway to be 0.500 for
the prevailing conditions.
Estimate the speed of the car when the brakes were applied.
a. 9.49 m/s
b. 21.0 m/s
c. 29.7 m/s
d. 42.0 m/s
8
48.
A rope one meter long rests on a table where the coefficient of friction is 0.50. What
maximum length of rope can hang over the side before the whole rope will slip off?
a. 33 cm
b. 40 cm
c. 50 cm
d. 67 cm
49.
An object moves with a constant speed of 20 m/s on a circular track of radius 100 m.
What is the acceleration of the object?
a. zero
b. 0.40 m/s2
c. 2.0 m/s2
d. 4.0 m/s2
50.
A car is negotiating a flat curve of radius 50 m with a speed of 20 m/s. The centripetal
force provided by friction is 1.2X104 N. What is the mass of the car?
a. 500 kg
b. 1000 kg
c. 1500 kg
d. 2000 kg
51.
The maximum force a pilot can stand is about seven times his weight. What is the
minimum radius of curvature that a jet plane's pilot, pulling out of a vertical dive, can
tolerate at a speed of 250 m/s?
a. 4.25 m
b. 3.64 m
c. 1060 m
d. 911 m
52.
A stone, of mass m, is attached to a strong string and whirled in a vertical circle of radius
r. At the exact top of the path the tension in the string is 3 times the stone's weight. The
stone's speed at this point is given by
a. 2(gr)1/2
b. (2gr)1/2
c. (gr)1/2
d. 2gr
53.
A coin of mass m rests on a turntable a distance r from the axis of rotation. The turntable
rotates with a frequency of f. What is the minimum coefficient of static friction between the
turntable and the coin if the coin is not to slip?
a. (4ã2f2r)/g
b. (4ã2fr2)/g
c. (4ãf2r)/g
d. (4ãfr2)/g
54.
The mass of the moon is 7.4X1022 kg and its mean radius is 1.75X103 km. What is the
acceleration due to gravity at the surface of the moon?
a. 2.8X106 m/s2
b. 9.80 m/s2
c. 1.6 m/s2
d. 0.80 m/s2
9
55.
An object weighs 432 N on the surface of the earth. The earth has radius r. If the object is
raised to a height of 3r above the earth's surface, what is its weight?
a. 432 N
b. 48 N
c. 27 N
d. 0 N
56.
Two planets have the same surface gravity, but planet B has twice the radius of planet A.
If planet A has mass m, what is the mass of planet B?
a. 0.707m
b. m
c. 1.41m
d. 4m
57.
A spherically symmetric planet has four times the earth's mass and twice its radius. If a
jar of peanut butter weighs 12 N on the surface of the earth, how much would it weigh on
the surface of this planet?
a. 6.0 N
b. 12 N
c. 24 N
d. 36 N
58.
Europa, a moon of Jupiter, has an orbital diameter of 1.34X10‹ m, and a period of 3.55
days. What is the mass of Jupiter?
a. 1.83X10‚‰ kg
b. 1.85X10‚‰ kg
c. 1.87X10‚‰ kg
d. 1.89X10‚‰ kg
59.
Two objects attract each other gravitationally. If the distance between their centers
doubles, the gravitational force
a.
b.
c.
d.
quadruples.
doubles.
is cut in half.
is cut to a fourth.
60.
A 50 N object was lifted 2.0 m vertically and is being held there. How much work is being
done in holding the box in this position?
a. More than 100 J
b. 100 J
c. Less than 100 J, but more than 0 J
d. 0 J
61.
A container of water is lifted vertically 3.0 m, then returned to its original position. If the
total weight is 30 N, how much work was done?
a. 45 J
b. 90 J
c. 180 J
d. No work was done.
10
62.
A 10-kg mass, hung onto a spring, causes the spring to stretch 2.0 cm.
What is the spring constant?
a. 4.9X103 N/m
b. 5.0X103 N/m
c. 20 N/m
d. 2.0 N/m
63.
Calculate the work required to compress an initially uncompressed spring with a spring
constant of 20 N/m by 15 cm.
a. 0.15 J
b. 0.30 J
c. 0.23 J
d. 0.45 J
64.
A driver, traveling at 22 m/s, slows down her 2000 kg car to stop for a red light. What
work is done by the friction force against the wheels?
a. -2.2X104 J
b. -4.4X104 J
c. -4.84X105 J
d. -9.68X105 J
65.
A horizontal force of 200 N is applied to move a 55-kg cart (initially at rest) across a 10 m
level surface. What is the final kinetic energy of the cart?
a. 1.0X103 J
b. 2.0X103 J
c. 2.7X103 J
d. 4.0X103 J
66.
A 10-kg mass is moving with a speed of 4.0 m/s. How much work is required to stop the
mass?
a. 20 J
b. 40 J
c. 60 J
d. 80 J
67.
A 5.00-kg object is moved from a height of 3.00 m above a floor to a height of 7.00 m
above the floor. What is the change in gravitational potential energy?
a. zero
b. 147 J
c. 196 J
d. 343 J
68.
A roller coaster starts with a speed of 5.0 m/s at a point 45 m above the bottom of a dip.
Neglect friction, what will be the speed of the roller coaster at the top of the next slope,
which is 30 m above the bottom of the dip?
a. 12 m/s
b. 14 m/s
c. 16 m/s
d. 18 m/s
11
69.
What is the minimum speed of the ball at the bottom of its swing (point B) in order for it to
reach point A, which is 1.0-m above the bottom of the swing?
a. 2.2 m/s
b. 3.1 m/s
c. 4.4 m/s
d. 4.9 m/s
70.
An object slides down a frictionless inclined plane. At the bottom, it has a speed of 9.80
m/s. What is the vertical height of the plane?
a. 19.6 m
b. 9.80 m
c. 4.90 m
d. 2.45 m
71.
A 60-kg skier starts from rest from the top of a 50-m high slope. What is the speed of the
slier on reaching the bottom of the slope? (Neglect friction.)
a. 22 m/s
b. 31 m/s
c. 9.8 m/s
d. 41 m/s
72.
A lightweight object and a very heavy object are sliding with equal speeds along a level
frictionless surface. They both slide up the same frictionless hill. Which rises to a greater
height?
a. The heavy object, because it has greater kinetic energy.
b. The lightweight object, because it weighs less.
c. They both slide to the same height.
d. Cannot be determined from the information given.
73.
A 12 kg object is moving on a rough, level surface. It has 24 J of kinetic energy. The
friction force on it is a constant 0.50 N. How far will it slide?
a. 2.0 m
b. 12 m
c. 24 m
d. 48 m
74.
A 1500-kg car moving at 25 m/s hits an initially uncompressed horizontal spring with
spring constant of 2.0X106 N/m. What is the maximum compression of the spring?
(Neglect the mass of the spring.)
a. 0.17 m
b. 0.34 m
c. 0.51 m
d. 0.68 m
75.
A 1.0-kg ball falls to the floor. When it is 0.70 m above the floor, its potential energy
exactly equals its kinetic energy. How fast is it moving?
a. 3.7 m/s
b. 6.9 m/s
c. 14 m/s
d. 45 m/s
12
76.
A projectile of mass m leaves the ground with a kinetic energy of 220 J. At the highest
point in its trajectory, its kinetic energy is 120 J. To what vertical height, relative to its
launch point, did it rise?
a. 220/(mg) meters
b. 120/(mg) meters
c. 100/(mg) meters
d. Impossible to determine without knowing the angle of launch.
77.
A 30.0-N stone is dropped from a height of 10.0 m, and strikes the ground with a velocity
of 7.00 m/s. What average force of air friction acts on it as it falls?
a. 22.5 N
b. 75.0 N
c. 225 N
d. 293 N
78.
A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by
friction is -6.0X103 J, what is the speed of the skier on reaching the bottom of the slope?
a. 17 m/s
b. 24 m/s
c. 28 m/s
d. 31 m/s
79.
A force of 10 N is applied horizontally to a 2.0-kg mass on a level surface. The coefficient
of kinetic friction between the mass and the surface is 0.20. If the mass is moved a
distance of 10 m, what is the change in its kinetic energy?
a. 20 J
b. 39 J
c. 46 J
d. 61 J
80.
At what rate is a 60.0-kg boy using energy when he runs up a flight of stairs 10.0-m high,
in 8.00 s?
a. 75.0 W
b. 735 W
c. 4.80 kW
d. 48 W
81.
A 10-N force is needed to move an object with a constant velocity of 5.0 m/s. What power
must be delivered to the object by the force?
a. 0.50 W
b. 1.0 W
c. 50 W
d. 100 W
82.
What is the momentum of a 2000 kg truck traveling at 20 m/s?
a. 1.0X102 kgúm/s
b. 2.0X104 kgúm/s
c. 4.0X104 kgúm/s
d. 4.0X105 kgúm/s
13
83.
A ball of mass 0.10 kg is dropped from a height of 12 m. Its momentum when it strikes
the ground is
a. 1.5 kg∙m/s
b. 1.8 kg∙m/s
c. 2.4 kg∙m/s
d. 4.8 kg∙m/s
84.
A small object with a momentum of magnitude 5.0 kg∙m/s approaches head-on a large
object at rest. The small object bounces straight back with a momentum of magnitude 4.0
kg∙m/s. What is the magnitude of the small object's momentum change?
a. 9.0 kg∙m/s
b. 5.0 kg∙m/s
c. 4.0 kg∙m/s
d. 1.0 kg∙m/s
85.
A 100-kg football linebacker moving at 2.0 m/s tackles head-on an 80-kg halfback running
3.0 m/s. Neglecting the effects due to digging in of cleats,
a. the linebacker will drive the halfback backward.
b. the halfback will drive the linebacker backward.
c. neither player will drive the other backward.
d. this is a simple example of an elastic collision.
86.
A 50-kg pitching machine (excluding the baseball) is placed on a frozen pond. The
machine fires a 0.40-kg baseball with a speed of 35 m/s in the horizontal friction. What is
the recoil speed of the pitching machine? (Assume negligible friction.)
a. 0.14 m/s
b. 0.28 m/s
c. 0.70 m/s
d. 4.4X103 m/s
87.
A 10.0-g bullet moving at 300 m/s is fired into a 1.00-kg block. The bullet emerges (the
bullet does not embedded in the block) with half of its original speed. What is the velocity
of the block right after the collision?
a. 1.50 m/s
b. 2.97 m/s
c. 3.00 m/s
d. 273 m/s
88.
A car of mass 1000 kg moves to the right along a level, straight road at a speed of 6.0
m/s. It collides directly with a stopped motorcycle of mass 200 kg. What is the total
momentum after the collision?
a. zero
b. 6000 kg∙m/s to the right
c. 2000 kg∙m/s to the right
d. 10,000 kg∙m/s to the right
89.
A 1000-kg car traveling at 25 m/s runs into the rear of a stopped car that has a mass of
1500 kg and they stick together. What is the speed of the cars after the collision?
a. 5.0 m/s
b. 10 m/s
c. 15 m/s
d. 20 m/s
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