Download Conceptual Physics Review # 3

Conceptual Physics Review # 3
1. A student notices broken equipment at her lab station. What action should she
take?
a.
b.
c.
d.
Ignore it.
Use the equipment.
Tell the teacher
Switch the equipment with another’s group when they are not looking.
2. Which quantity is a scalar?
a.
b.
c.
d.
Acceleration
Distance
Displacement
Velocity
3. Which quantity is a vector?
a.
b.
c.
d.
Distance
Displacement
Mass
Volume
4. Which statement best describes a hypothesis?
a)
b)
c)
d)
A hypothesis cannot be proved wrong.
A hypothesis is a scientific theory.
A hypothesis must be testable.
A hypothesis can never change.
5. A student walks 160 m in 150 s. The student stops for 30 s and then walks 210 m
farther in 140 s. What is the average speed of the entire walk?
A.
B.
C.
D.
0.53 m/s
0.80 m/s
1.2 m/s
1.3 m/s
6. An airplane went form 120 m/s to 180 m/s in 4.0 seconds. What was its acceleration?
A.
B.
C.
D.
15 m/s2
30 m/s2
45 m/s2
60. m/s2
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7. Which position vs. time graph indicates an object undergoing uniformly accelerated
motion?
8. A tile falls freely from rest from the roof of a building. What is the total distance the
tile falls in the first second?
A. 19.6m
B. 9.8m
C. 4.9m
D. 2.5m
9. The development of the Universal Law of Gravitation was most likely
developed by studying the interactions between:
a.
b.
c.
d.
force and mass
force, mass & acceleration
masses and distance between 2 objects
masses and acceleration between 2 objects
10. Which scientist is credited with the development of the law of motion used to
analyze the diagram above?
e.
f.
g.
h.
Albert Einstein
Isaac Newton
Galileo
Kepler
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11. The diagram below represents a displacement vector A, and a resultant displacement
vector R.
Which displacement vector B, below, could be added to displacement vector A to
produce resultant vector R?
A.
B.
C.
D.
12. Look at the diagram above, what is the magnitude of the net force acting on
the object?
A. 25N
B. 125N
C. 75N
D. 50N
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13. The graph below represents the motion of a bicyclist over a time period of 10
seconds.
What is the average velocity of the bicyclist between 0 and 3 seconds?
A. 3.3m/s
B. 5.0 m/s
C. 7.5 m/s
D. 10. m/s
14. Accuracy is best defined as ____________________ and precision is best
defined as __________________.
i.
j.
k.
l.
repeatability of measurement; closeness to accepted value
closeness to accepted value; repeatability of measurement
both are repeatability of measurement
both are closeness to accepted value
15. An astronaut is traveling to the moon. The scientists at Johnson Space
Center are collecting data for the mission. At what point do the scientists need to
stop using Earth’s gravitational pull in calculations?
m.
n.
o.
p.
When the spacecraft is above Earth’s atmosphere
When the spacecraft is half-way to the moon
When the spacecraft is closer to the moon than to Earth
The spacecraft will never reach a point beyond the pull of Earth’s
gravity
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16. Which path represents the arrows with the greatest horizontal velocity?
A.
B.
C.
D.
1
2
3
4
17. A ball is thrown horizontally. Which factor will increase the flight time of the
ball?
A.
B.
C.
D.
increasing the vertical height from which the ball is thrown
increasing the horizontal velocity of the ball
decreasing the horizontal velocity of the ball
decreasing the vertical height from which the ball is thrown
18. A 0.200 kg puck is fired across the ice with an initial velocity of 18.0 m/s. If it
takes 9.00 s to come to a complete stop, what is the magnitude of the net force?
A.
B.
C.
D.
0.100 N
0.400 N
2.00 N
4.00 N
19. Inertia varies depending on
A. mass
B. motion
C. gravity
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20. Two forces are applied to a 2.0-kg block on a frictionless horizontal surface,
as shown in the diagram below. The acceleration of the block is
A.
B.
C.
D.
1.5 m/s2 to the right
4.0 m/s2 to the left
2.5 m/s2 to the right
2.5 m/s2 to the left
Questions 21 and 22
21. A ball is placed at the top of the incline and held at rest. What is true about
the force of gravity acting on the ball?
A.
B.
C.
D.
Gravity points directly down the incline.
Gravity points directly up along the incline.
Gravity points vertically downward.
Gravity points vertically upward.
22. Increasing the angle of the incline increases the final speed of the ball. What
else does it change?
A. the mass of the ball
B. the weight of the ball
C. impossible to determine
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23. Newton’s first law of motion tells us that an object will move ___ unless acted
on by an unbalanced force.
A. in a curved path
B. with a constant acceleration
C. in a straight line
D. with a continual deceleration until its velocity reaches zero
24. The value of G, the gravitational constant of proportionality in Newton’s law of
gravitation, is _______ as you move away from earth.
a.
b.
c.
d.
larger
smaller
the same everywhere
zero
25. If the Moon were positioned twice as far from the Earth as it is now, the gravitational
attraction would be
e. twice as great.
f. four times as great.
g. one-fourth as great.
h. the same as it is now.
26. The gravitational force between two objects would______ if the mass of one of the
objects were suddenly to become four times greater.
a. double
b. quadruple
c. decrease by a factor of 16
d. increase by a factor of 16
27. Which of these would cause the gravitational force between Earth and the
sun to decrease?
a. An increase in the length of a day on Earth.
b. An increase in the distance between Earth and the sun.
c. An increase in the number of planets orbiting the sun
d. An increase in the masses of Earth and the sun
28. What is the force of attraction between a 0.9 kg and a 0.8 kg mass if their
centers are separated by 20 m.
e. 1.2006 x 109
f. 1.2006 x 10-9
g. 2.4012 x 1010
h. 2.4012 x 10-10
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29. Which statement is true? Kinetic energy and potential Energy are
a. Kinetic energy and potential energy are both energy of position.
b. Kinetic energy and potential energy are both energy of motion.
c. Kinetic energy is energy of position and potential energy is energy of motion.
d. Kinetic energy is energy of motion and potential energy is energy of position.
30. When a force is exerted over a distance, we say that ___ has occurred.
a.
b.
c.
d.
energy
work
power
potential energy
31.
32. What is the potential energy of the 4 kg ball shown above?
a.
b.
c.
d.
74 J
117.6 J
12 J
0J
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33.
34.
35.
36.
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37. In the diagram above, at which point will the bicyclist’s potential energy be the least?
a.
b.
c.
d.
Point W
Point X
Point Y
Point Z
38. In the diagram above, at which point will the bicyclist’s kinetic energy be the least?
a.
b.
c.
d.
Point W
Point X
Point Y
Point Z
39.
10
40.
41.
42.
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43. The momentum of an object is defined as the object’s
a. mass times its acceleration
b. mass times its velocity
c. force times its acceleration
d. force times the time interval
44. The law of conservation of momentum states
a. The total momentum of an isolated system always remains constant.
b. The total momentum of an isolated system never remains constant.
c. The total momentum of an isolated system is equal to the total energy of
the system.
d. The total momentum of an isolated system is equal to the total mass of the
system.
45. In a inelastic collision the objects
e.
f.
g.
h.
Two objects don’t collide.
Two objects collide and stick together.
Two objects collide and bounce off each in opposite directions.
Two objects collide and bounce off each other in the same direction
46. In a car accident, car A of 1000kg is hit by car B of 1580 kg. Car A is initially at
rest. From the markings of the tires on the road, police found that the speed of car A was
10 m/s after collision and the speed of car B was 8 m/s after collision. What is the speed
of car B before collision?
a. 16.97 m/s
c. 14.32 m/s
b. 20.58 m/s
d. 26.44 m/s
47. A 5 kg blob of clay moving at 2 m/s slams into a 4 kg blob of clay at rest. The speed
of the two blobs stuck together after colliding is about
48.
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49.
50.
51.
52.
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