HMH Unit 8 Force and Motion Review (5th Grade)

Forces that cause a change in motion are

• balanced forces

• force

• unbalanced forces

• friction

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NGSS.MS-PS2-2

A force of attraction between two objects, even if they are not touching, is

• friction

• force

• gravity

• balanced forces

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A push or a pull, which causes movement or change in an object's movement or shape, is a(n)

• gravity

• unbalanced forces

• friction

• force

Tags

NGSS.MS-PS2-2

Forces on an object that are equal in size and opposite in direction are

• balanced forces

• unbalanced forces

• force

• gravity

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NGSS.3-PS2-1

A force that opposes motion and acts between two objects that are touching

• force

• gravity

• balanced forces

• friction

Suri places magnets on three identical toy cars, as shown. Then, Suri measures how far each car rolls when she launches it from the same starting point using the same stretched rubber band.

Which statement is true?

• Car 3 will travel the longest distance.

• Car 1 will travel the shortest distance.

• Car 1 will be the least affected by the force acting upon it.

• Car 3 will be the least affected by the force acting upon it.

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NGSS.MS-PS2-1

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When you coast down a hill on a bicycle, you move faster and faster. Then when you keep coasting on a level surface, you eventually stop moving. What causes you to stop?

• No force is acting on your bike on the level surface, so it stops moving.

• After you reach the bottom of the hill, you run out of energy, so you stop moving.

• Friction between the tires and the ground is an unbalanced force that changes your motion.

• Gravity affects you when you move downhill, but there is no gravity when you move on a level surface.

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NGSS.MS-PS2-2

Jean held a spring scale with a weight hanging on its hook. She observed that the force on the scale was 3 N. Why was the force greater than 0 N even though the weight was not moving?

• The 3 N force was balancing the force of gravity.

• The weight was not moving, but the forces on it were constantly changing.

• The spring scale was broken, so it showed 3 N even though the real force was zero.

• The 3 N force was the amount of unbalanced force on the weight.

A crane raises and lowers objects and also moves them back and forth. The illustration shows a crane lifting a heavy box.

What must the crane work against in order to lift the box upward?

• wind

• friction

• gravity

• cable tension

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NGSS.MS-PS2-2

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The following table shows the masses of several different objects. You want to toss each object a distance of 2 meters.

Which object will require the most force to toss it 2 meters?

• metal washer

• rock

• plastic disk

• wooden block

Tags

NGSS.MS-PS2-2