Force and Motion Review

A student uses the same force to push a golf ball, a ping pong ball, a bowling ball, and a baseball.  Which will move the fastest?

• the golf ball
• a ping pong ball
• a bowling ball
• a baseball

What can cause a moving object to increase its speed in a forward direction?

• a force pushing on the object from the opposite direction
• a force that continually acts on the object in the direction the object is moving
• an increase in the mass of the object
• a decrease in the mass of the object

A girl walked for 30 minutes. She noticed that she traveled farther in the first 15 minutes of her walk than in the second 15 minutes. What can she conclude about her walk?

• She walked over many hills.
• Her average speed was faster during the first half of her walk.
• She walked in two different directions.
• She was walking at a constant speed

A pencil falls off of a desk. What moves the pencil toward the floor?

• mass
• friction
• gravity
• speed

Four different students take turns pushing a large, heavy ball on the school parking lot. What is the best way to determine which student used the most force to push the ball?

• compare the sizes of the students
• compare the ages of the students
• compare the distances that the ball rolled
• compare the number of times the ball was rolled

Two students sit on a seesaw in a way that makes it balance and not move. When a third person pushes down on one side, that side moves down. What caused the seesaw to move?

• The effect of gravity increased when one side was pushed down
• The friction between the two sides decreased because of the push.
• The total force increased on the side that was pushed down.
• The push on one side of the seesaw decreased the force on the other side.

Manuel is building a car to race down a ramp. The car weighs 100 grams. Which could Sam do to increase the speed of the car?

• increase the mass of the car
• decrease the mass of the car
• increase the friction on the ramp

Alex ran down the sidewalk to school with her empty backpack. After school Alex’s backpack was loaded with books. Which best describes the force required to carry her book bag home?

• It took the same amount of force to carry the loaded book bag home.
• It took a greater amount of force to carry the loaded book bag home.
• It took a lesser amount of force to carry the loaded book bag home.

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed

Karla left a bowling ball and kickball outside on a windy day. Which best explains why the kickball moved but the bowling ball did not?

• The kickball has less mass so it was easier to move.
• The force of gravity acting on the bowling ball is greater
• The mass of the kickball is greater so it is easier to move.