Forces and Motion Review

Which of the following objects will have the greatest change in motion?

• A small force which is applied to an object with a large mass.

• A small force is applied to an object with a small mass.

• A large force is applied to an object with a large mass.

• A large force is applied to an object with a small mass.

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Jamal threw a ball into the air and watched it go up for a long time. Then it started to fall back toward him. What force caused the ball to return to the ground?

• friction

• gravity

• motion

• wind

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Arrows represent the forces applied to an object. A longer arrow means a greater force. Which object will move upward?

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When an unbalanced force is applied to an object, the object moves in the direction of the force. Which graph shows how the same force will affect objects that have different masses?

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Look at the illustration. Two boys are about to use the same force to push a parent and a child. Which describes what will happen?

• The parent will swing higher.

• The parent will accelerate faster.

• The child will accelerate faster.

• The parent and the child will accelerate at the same rate.

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Clara tests how far three identical toy cars travel under three different conditions. Which reasoning explains how Clara is controlling variables?

• The mass and force change for each trial.

• Neither the mass nor force change for each trial.

• The mass changes for each trial, but the force does not.

• The force changes for each trial, but the mass does not change.

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NGSS.MS-PS2-2

Omar pushes a cart with three books so it just reaches the end of a track. Next, he puts six books onto the car. Which claim explains what he must do so that the car reaches the end of the track?

• use less force

• use more force

• use the same amount of force

• use a different cart

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NGSS.MS-PS2-2

Cole asked the questions "Does the number of coils in a spring affect how far it will launch a ball?" How can Cole improve the experiment he designed to answer his question?

• by repeating each measurement

• by adding uncontrolled variables

• by trusting his opinions

• by changing data that doesn't fit

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Alanis pushes a toy truck and lets it roll across a flat surface. She measures the distance it travels. Then she adds different numbers of wood blocks to her truck. Based on the evidence in the table, what is most likely the measurement missing from the table?

• 12 cm

• 30 cm

• 57 cm

• 98 cm

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NGSS.MS-PS2-2

Dakota uses a stretched rubber band to propel a toy car across a flat surface. What force makes the car roll forward?

• a push from the air

• the pull of gravity

• a pull from Dakota's hand

• a push from the rubber band

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