Download PHYS 100 Introductory Physics Sample Exam 1 Useful Stuff: Section

PHYS 100
Introductory Physics
Sample Exam 1
Useful Stuff:
Acceleration due to Gravity = 10 m/s 2
Average Speed =
Acceleration =
Distance =
Total Distance
Elapsed Time
(Final Velocity - Initial Velocity)
Time Interval
1
x (Acceleration) x (Time) 2
2
Acceleration =
Net Force
Mass
Weight = Mass x Acceleration due to Gravity
Free fall with air resistance : Net Force = (Weight - Air Resistance)
Section A: All questions in this section are mandatory.
1. A train is traveling with a constant speed of 25 m/s. A boy inside the train tosses a ball in
a direction that is the same as the train’s direction. With respect to the ground, the ball’s
speed is,
a.
b.
c.
d.
25 m/s
greater than 25 m/s
less than 25 m/s
can not say for sure
The figure shown here is the distance versus time graph for two
cars, A and B. Please refer to this graph for questions 2 and 3.
Distance
2. What can you say about their speeds?
a.
b.
c.
d.
A
Speed of A was greater
Both traveled at the same speed
Speed of B was greater
Speed can not be determined from this graph
B
Time
3. What can you say about their velocities?
a.
b.
c.
d.
Their velocities are increasing
Their velocities are same
Their velocities are different
Velocity can not be determined from this graph
4. As an object freely falls without air resistance, its
a.
b.
c.
d.
Velocity increases
Acceleration increases
Both of these
None of these
5. An object weighs 30 N on the earth. A second object weighs 30 N on Jupiter, where the
acceleration due to gravity is about 25 m/s2. Which has the greater mass?
a.
b.
c.
d.
6.
The one on the earth
The one on Jupiter
They have the same mass
Not enough information to say
What is the acceleration of a car that maintains a constant velocity of 100 km/h for 10 sec ?
a. 0
b. 10 km/h/s
c. 1000 km/h/s
d. 10 m/h/s
7. A skydiver, who weighs 410 N, reaches terminal velocity of 90 km/h. The air resistance on the
diver is then
a. zero
b. 90 N
c. 410 N
d. 500 N
8. An asteroid is traveling without any external forces acting on it. According to Newton’s 1st law,
which path is it likely to follow?
1
2
a. 1
3
b. 2
4
c. 3
d. 4
9. How many micrometers are there in 1 millimeter?
a. 1
b. 1000
c. 0.001
d. 0.1
10. The average speed of a horse that gallops a distance of 10 km in a time of 20 minutes is,
a. 20 km/h
b. 10 km/h
c. 30 km/h
d. more than 30 km/h
11. A karate chop delivers a blow of 3000 N on a board that breaks. The force that acts on the hand
during this event is actually
a.
b.
c.
d.
3000 N
more than 3000 N
less than 3000 N
…there is really no way to say for sure
Velocity
12. Velocity versus time data is given for an automobile.
What can you say about its motion?
a.
b.
c.
d.
It is moving with zero acceleration
It is moving with a constant speed
It is speeding up
It is slowing down
0
Time
13. A kilogram is a measure of an object’s
a. Inertia
b. Weight
c. Force
d. Gravity
14. Which one of the following represents 3.56 x 10-3?
a. 35600
b. 35600000
c. 0.00356
d. 0.0000356
15. Force is a vector quantity because it has both
a.
b.
c.
d.
magnitude and direction
mass and acceleration
action and reaction counterparts
speed and time
The figure shown here is the distance versus time graph. Please refer to this graph for questions
16, 17 and 18.
Distance (m)
16. What is the total distance traveled during this trip?
A)
B)
C)
D)
0
25 m
30 m
60 m
30
0
10
25
17. What is its speed during the interval from 10 to 25 seconds?
A) 2 m/s
B) 3 m/s
C) 10 m/s
D) 0 m/s
18. What is the average speed for the entire trip (0 to 25 seconds)?
A) 0
B) 30 m/s
C) 2.4 m/s
D) 1.2 m/s
C) law.
D) none of these.
C) velocity
D) mass
19. In science, an educated guess is a
A) theory.
B) hypothesis.
20. Which of the following is not a vector quantity?
A) force
B) acceleration
Time (s)
The figure shown here diagrams a falling skydiver of mass 60 kg who experiences a 360 N drag
force due to air resistance. Use this diagram to answer questions 21, 22 and 23.
21. What is the magnitude of the net force on this skydiver?
A)
B)
C)
D)
360 N
600 N
300 N
960 N
240 N
Mass = 60 kg
22. What is the direction of the net force?
A)
B)
C)
D)
up
down
left
right
Weight
23. What is the magnitude of the acceleration of this skydiver at that instant?
A) 4 m/s2
B) 16 m/s2
C) 5 m/s2
D) 10 m/s2
24. A rock is thrown vertically upward with a speed of 25 m/s. What are its speed and direction 2
seconds later?
A)
B)
C)
D)
5 m/s upward
10 m/s downward
zero
5 m/s downward
25. Velocity and acceleration vectors on a vehicle are shown. In which one of these situations will
the vehicle speed up?
Velocity
A)
Velocity
B) Acceleration
Acceleration
C)
D)
Velocity
Acceleration
Velocity
Acceleration = 0