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- 1. Multiple Choice
When you slide a box across the floor, what force does your push have to be greater than in order for there to be emotion.
Normal force
Gravitational force
Air resistance force
Frictional force
- 2. Multiple Choice
What makes a good reference point?
Something that is in constant motion
Something that is acceleration
Something that is stationary (not moving)
Something that is decelerating
- 3. Multiple Choice
What causes a change in an object's motion?
Balanced forces
Acceleration
Unbalanced forces
- 4. Multiple Choice
In the picture, what force is acting upward on the skydiver?
Gravity
Air resistance
- 5. Multiple Choice
In the picture, what force is acting downward on the skydiver?
Gravity
Air resistance
- 6. Multiple Choice
A cyclist rides north past an old man sitting on a bench. What direction will the cyclist see the old man moving? Assume that the old man is sitting still.
North
South
East
West
The old man will not appear to be moving
- 7. Multiple Choice
What would be a good reference point to describe the motion of the Earth within our solar system?
The sun
The Earth
The mountains on Earth
The Milky Way
- 8. Multiple Choice
Select all of the at-a-distance forces.
Gravity
Electric charges
Magnetism
Friction
- 9. Multiple Choice
What is the Net Force on the box shown below?
12N upward
12N downward
23N to the right
17N to the left
17N to the right
- 10. Multiple Choice
What is the Net Force on the box shown below?
100N upward
150N left
0N
- 11. Multiple Choice
During a baseball game, a hitter strikes the ball with a bat. When this happens, the ball and the bat exert a force on each other. Why does the ball accelerate away from the bat more than the bat accelerates away from the ball?
The ball has greater velocity before the collision, so the force affects the ball more than it affects the bat.
The bat exerts more force than the ball because the batter is exerting a force on the bat as it hits the ball.
The ball has less mass, so the equal force on the ball and the bat causes greater acceleration of the ball.
- 12. Multiple Choice
A person is staying in the middle of a boxcar on a train moving 100km per hour (see image). If the motion of the boxcar remains constant, where in the boxcar will the person most likely land after he jumps straight up?
- 13. Multiple Choice
Which term is an example of force?
Energy
Mass
Weight
Work
- 14. Multiple Choice
Horizontal forces act on two boxes, initially at rest, as shown. The magnitude and direction of the horizontal forces are also shown. What happens to Box X and Box Y as a result of the forces?
Box X starts moving, speeding up, and Box Y remains at rest.
Box X starts moving at constant speed, and Box Y remains at rest.
Box X starts moving at constant speed, and Box Y starts moving, speeding up.
Box X starts moving, speeding up, and Box Y starts moving at a constant speed.
- 15. Multiple Choice
A battery-powered toy submarine is moving through water at constant speed and at a constant depth below the surface. The diagram shows the submarine with arrows representing the directions but not the magnitudes of four forces acting on it. Which conclusion can be made about the magnitudes of the forces acting on the submarine?
Force Q is equal to Force S and Force R is equal to Force T.
Force Q is less than Force S and Force R is equal to Force T.
Force Q is equal to Force S and Force R is greater than Force T.
Force Q is less than Force S and Force R is greater than Force T.
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