Energy, Force and Motion

If an object is 'at rest' all the forces acting on the object must be _______.

• unbalanced

• strong

• weak

• balanced

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The speed an object is moving is determined by which two measurements?

• weight & gravity

• distance & time

• length & width

• mass & time

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Which force slows down and can stop a moving object?

• friction

• attract or repel

• push or pull

• gravity

Darlene drove her car 45 miles from Lake Worth to Belle Glade. What else would she need to measure to find her average speed?

• mass of car

• weight of car

• pull of gravity

• time to travel

Ricardo watches horses run around the race track. Each time he looks at a different horse, it has changed _____ on the race track.

• time

• mass

• position

• weight

This cartoon shows that to move an object with more mass, you need to apply more ________.

• friction

• speed

• force

• momentum

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NGSS.MS-PS2-2

Jackie uses a parachute in an egg-drop competition. What force is she trying to overcome?

• friction

• magnetism

• wind

• gravity

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If the two forces acting on a race car are unbalanced, what must the car be doing?

• stopping

• moving

• turning

• resting

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The pull between some metal objects and a

magnet is a force called __________.

• friction

• magnetism

• attracting

• repelling

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What is the name of the force that works against the motion of an object, slowing it down, or stopping?

• push

• pull

• gravity

• friction