Name ______Per ______
Pre and Post Assessment – Fair Play
1. A net force (an unbalanced force that changes motion) causes an object to
a. stay at the same speed.
b. not move.
c. accelerate (speed up) or decelerate (slow down).
d. explode.
2. Forces that are equal in size and opposite in direction are known as
a. balanced forces
b. net forces
c. friction forces
d. accelerated force
3. You are riding fast on a skateboard when your wheel suddenly gets stuck in a crack on
the sidewalk. Why does your body go flying forward?
a. there is a net force pushing you off your skateboard
b. your inertia keeps you moving forward
c. someone pushed you
d. you accelerated
4. You just collected a huge bag of leaves in your yard, and you need to move it out to
the curb. How could you get the bag to move faster?
a. use more force (push harder)
b. take some leaves out to make it weigh less (reduce its mass)
c. add more leaves (increase its mass)
d. both a and b would work (both pushing harder and reducing its mass)
5. The force that one surface exerts on another when the two rub against each other is
called
a. friction.b. acceleration. c. inertia.d. velocity
6. In science, a push or a pull is called a(n)
a. force. b. acceleration. c. inertia. d. resistance
7. When you slide a box across the floor what force must your push be stronger than?
- Friction
- Gravity
- Air resistance
- Temperature
8. This test paper is sitting at rest on your desk. Which of the following statements best describes this situation?
a. There are no forces acting on your paper.
b. Your paper pushes on the desk only.
c. The forces acting on the paper are balanced.
d. The desk is pushing down.
9. A change to an objects motion is caused by...
a. Balanced forces b. Unbalanced forces c. Acceleration d. Velocity
10. Which one of the following objects has the greatest inertia?
a. ping pong ball b. golf ball c. soft ball d. bowling ball
11. Describe the motion of a person not wearing a seat belt if the car stops suddenly.
a. The person and car will stop together.
b. The person will stop faster than the car because they are lighter
c. The car will stop and the person will keep moving forward because of inertia.
d. The car will stop and the person will speed up.
12. A falling object is heading toward the earth. Why doesn’t the earth move toward the object?
a. Only the earth has gravity.
b. The Earth has a very large mass in comparison to the falling object.
c. The Earth has a very small mass in comparison to the falling object.
d. Air resistance gets in the way.
13. When you walk across the ground and push on it with your feet…
a.there is no effect on the ground.
b. the ground pushes back less strongly than your feet.
c. the ground pushes back more strongly than your feet.
d. the ground pushes back on your feet with equal force.
14. A toy train engine rests motionless on a track. One student begins pushing the engine to
the right with a force of 2 newtons. At the same time, another student begins pushing the
engine to the left with a force of 5 newtons. Which of the following best describes the resulting
motion of the engine?
a. It travels left at a constant speed.
b. It travels left at an increasing speed.
c. It travels right at a constant speed.
d. It travels right at an increasing speed.
15. Study the force diagram below. In which direction, if any will the box move?
Name ______per ___
An object at rest will ______at rest unless acted on by an unbalanced ______. An object in motion continues in ______with the same speed and in the same direction unless acted upon by an ______force.This law is often called
"the law of ______".
Newton’s Law #1
Newton’s Law #2
Acceleration is produced when a ______acts on a mass. The ______the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).Newton’s Law #3
For every action there is an ______and ______re-action.