Force and Motion Unit Review

A student compares the amount of force used by his classmates to push a toy car down a ramp. What would be the BEST way to compare this force?

• Measure the distance each time the car comes to a stop.

• Measure the amount of time it takes the car to travel down the ramp.

• Measure the distance the car travels with each push.

• Measure the amount of time it takes for the car to come to a stop.

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NGSS.MS-PS2-2

A ball rolled toward Manny while he was playing soccer. If Manny’s foot kicks the ball as shown in the picture, which will MOST likely happen to the ball?

• The ball will stop rolling.

• The ball will roll toward the east.

• The ball will continue rolling west.

• The ball will go straight up in the air.

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Two students are investigating kinetic energy using a wooden board and a tennis ball. One student holds the end of the board, and the other student places the tennis ball on it. The tennis ball rolls along the board to the ground. What could be done by the student holding the board in order to increase the kinetic energy of the tennis ball as it rolls down the board?

• tilt the board to the left

• tilt the board to the right

• raise the end of the board

• lower the end of the board

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NGSS.MS-PS2-2

Chris attaches a sheet of sandpaper to the top of his skateboard. How

does this sandpaper most likely affect Chris’s skateboarding?

• it protects the skateboard from any damage.

• it allows Chris to steer the skateboard in a variety of directions.

• It reduces the effect gravity has on the skateboard as he moves down the ramp.

• It increases friction between the skateboard and Chris’s foot to keep him from slipping.

An 80 gram ball rolls along a flat surface at a constant speed in the same direction over 10 meters in 50 seconds. Which is the speed of the ball?

(speed = distance ÷ time)

• 0.2 meters per second

• 5 meters per second

• 50 meters per second

• 30 meters per second

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NGSS.MS-PS3-1

Billy rolls a toy truck filled with marbles across the kitchen floor. He then

dumps the marbles before rolling it back to his starting location. How

would the speed of the truck most likely change on the way back?

• The speed would increase due to friction.

• The speed would increase due to a change in mass.

• The speed would decrease due to a change in mass.

• The speed would decrease due to a change in gravity.

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What has the greatest impact on a free-falling object?

• friction

• gravity

• inertia

• momentum

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Ana is pushing a wheelbarrow of rocks. She stops and unloads half of the

rocks. How will this affect the force needed to move the wheelbarrow?

• Gravity is increased, making the wheelbarrow easier to move.

• Gravity is decreased, making the wheelbarrow harder to move.

• Friction is increased, making the wheelbarrow harder to move.

• Mass is decreased, making the wheelbarrow easier to move.

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NGSS.MS-PS2-2

The chart shows four identical wagons loaded with different

amounts of bricks. If the same amount of effort is applied to all four identical wagons, why would Wagon W move farthest?

• It has the least amount of mass, affecting its motion.

• It has the least amount of speed, affecting its motion.

• It has the greatest amount of gravity, affecting its motion.

• It has the greatest amount of friction, affecting its motion.

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NGSS.MS-PS2-2

This graph shows the movement of an earthworm. Gavin and Maddy observed an earthworm crawling on the sidewalk for four minutes. When did the earthworm move the greatest distance?

• between 0 and 1 minutes

• between 1 and 2 minutes

• between 2 and 3 minutes

• between 3 and 4 minutes

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NGSS.MS-PS3-1