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- 1. Multiple Choice
If you calculate the magnitude of friction force on a car that is moving, which coefficient of friction would you use?
coefficient of static friction
coefficient of kinetic friction
- 2. Multiple Choice
What is the NET force acting on the car moving to the right?
normal force
gravitational force
friction force
normal and gravitational forces
- 3. Multiple Choice
To determine mass of object in kg, you would _______.
divide gravitational force by 9.8 m/s/s
multiply gravitational force by 9.8 m/s/s
- 4. Multiple Choice
What is the common name for gravitational force?
normal force
acceleration due to gravity
weight
mass
- 5. Multiple Choice
For an object on a ramp, which of the following statements is FALSE?
Friction force acting on the object on a ramp is the net force.
Gravitational force is always drawn vertically straight down.
Normal force has the same magnitude as the gravitational force.
SOH CAH TOA is useful in determining forces on incline.
- 6. Multiple Choice
Determine the magnitude of x-component of the 1000-N tension force at a 30-degree angle.
952.41 N
304.81 N
866.03 N
500 N
- 7. Multiple Choice
What data are needed in a marathon experiment to calculate friction force? Choose 2 answers.
mass of runner
velocity of runner
type of road surface
displacement of runner
- 8. Multiple Choice
What is the net force acting on the billiard ball when it leaves the table? Neglect air resistance.
normal force
friction force
gravitational force
tension force
- 9. Multiple Choice
You throw a tennis ball vertically up and catch it. Which TWO graphs provide the slope to determine the tennis ball's acceleration?
position vs. time
displacement vs. time
velocity vs. time
net force vs. mass
- 10. Multiple Choice
What is the magnitude of vertical velocity of a tennis ball thrown vertically up in the air at its highest point?
zero
9.8 m/s
19.6 m/s
Not enough information
- 11. Multiple Choice
What is the magnitude of acceleration of the tennis ball thrown vertically up in the air at its highest position?
zero
9.8 m/s2
19.6 m/s2
depends on the height
- 12. Multiple Choice
How many objects are involved in an action-reaction force pair?
1
2
3
as many as possible
- 13. Multiple Choice
Determine the net force if mass is 4 kg, acceleration of +2.5 m/s/s, and applied force of 25 N.
4 N
10 N
15 N
25 N
- 14. Multiple Choice
Determine the magnitude of friction force if mass is 4 kg, acceleration of +2.5 m/s/s, and applied force of 25 N.
4 N
10 N
15 N
25 N
- 15. Multiple Choice
Determine the total distance traveled during 3 seconds.
10 m
30 m
45 m
90 m
- 16. Multiple Choice
Determine the acceleration due to gravity on the unknown planet.
3 m/s2
10 m/s2
30 m/s2
90 m/s2
- 17. Multiple Choice
An object is dropped from rest and falls freely 20 m to Earth. Which of the following statements is TRUE?
The speed of the object is 9.8 m/s at the end of its 1st second of falling.
The speed of the object is 9.8 m/s during the entire 1st second of its fall.
The speed of the object is 9.8 m/s during its entire time of its fall.
The speed of the object is 9.8 m/s after it has fallen 9.8 meters.
- 18. Multiple Choice
What is the vertical velocity of an object dropped from a height at 4 seconds? Ignore air resistance.
9.8 m/s
39.2 m/s
49 m/s
not enough information
- 19. Multiple Choice
How much force will produce equilibrium on the system?
200 N
350 N
500 N
700 N
- 20. Multiple Choice
Santa(na) rode on his sleigh 16,000 m west, then 12,000 m south. What is the magnitude of his displacement in km?
5.3 km
20 km
28 km
45 km
- 21. Multiple Choice
Describe the magnitude of vertical velocity of the billiard ball when it leaves the table. Neglect air resistance.
decreasing
increasing
constant
increasing then decreasing
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