Unit 4 Test: Forces and Motion

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

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

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

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

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

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NGSS.MS-PS2-2

Raoul throws a ball into the air and watches it go up for a long time. Then is starts to fall back toward him. What force causes the ball to return to the ground?

• A: friction

• B: gravity

• C: motion

• D: wind

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NGSS.MS-PS2-4

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

• 
• 
• 
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NGSS.MS-PS2-2

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

• 
• A: The parent will swing higher.

• B: The parent will accelerate faster.

• C: The child will accelerate faster.

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

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Stephan pushes a cart with three books so it just reaches the end of a track. He puts six books onto the cart. What must he use next time so the cart reaches the end of the track?

• A: less force

• B: more force

• C: the same force

• D: a different cart

Tags

NGSS.MS-PS2-2

Kaneesha 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. Which 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

If Alonzo wished to determine how the size of a force affected the motion of an object, which of the following would be the best strategy for his experiment?

• A: propel several toy cars of different shapes and designs across a surface using a rubber band

• B: propel a toy car across a flat surface using a rubber band stretched to three different degrees

• C: Propel a toy car across flat and sloped surfaces using a variety of objects, including rubber bands

• D: Propel three toy cars of different masses across a flat surface using a rubber band stretched tot he same degree.

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NGSS.MS-PS2-2

Danielle pulled gently on a spring scale. The scale showed a force, but the block did not move. Why not?

• A: The force that she applied was balanced by another force.

• B: The string between the spring scale an the block was not strong enough.

• C: The spring scale was broken, so there was no force when she pulled on it.

• D: There was not enough friction for the block to move.

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NGSS.MS-PS2-2

A group of students measured the amount of force needed to move a weight across a dry plastic table top. then they poured some water on the table and repeated the experiment on the wet surface. The students found that less force was needed to make the weight start moving on the wet surface than the dry surface. What caused the difference in the two experiments?

• A: Change in the amount of gravitational force on the weight

• B: Change in the mass of the weight used in the experiment

• C: change in the friction between the weight and the surface

• D: change in the friction between the weight and the scale used to measure force

Which of the following would occur as a result of unbalanced forces?

• A: A satellite orbits Earth at a constant speed.

• B: Twelve children lean their shoulders against a single wall.

• C: A bus moves along a highway in a straight line at 65 miles per hour.

• D: Two tug-of-war teams move an inch in one direction, then an inch in the opposite direction.

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NGSS.MS-PS2-2