Forces Review

Melissa is carrying a stack of books and it suddenly falls over. The books fall to the floor. Which force caused them to fall?

• friction

• gravity

• static electricity

• magnetism

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Which situation has the higher friction?

• snowboarding down a hill

• roller skating on a skating rink

• using breaks to stop your car

Which situation has the lower friction?

• sledding down a hill

• using brakes to stop your bike

• wearing hiking boots to climb the mountain

In which of the tug of war contests would the dog win?

• elephant vs dog

• dog vs horse

• dog vs dinosaur

• dog vs mouse

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If dad spilled nails all over the carpet, which of these solutions would help him pick up the nails quickly and easily?

• a magnet attached to a pole

• picking up the tacks by hand

• mowing the carpet

• using a flashlight

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Which of the following situations use a pulling force?

• throwing a frisbee

• kicking a ball

• bouncing a basketball

• using a leash to walk my dog

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Which of these examples work because of magnets?

• hand sanitizer cleans our hands

• plastic letters with magnets that stick to a refrigerator

• swings that go back and forth on a playground

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Which example below would force the magnets to attract?

• north to north

• south to south

• north to south

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Which concept of force does this picture show?

• gravity

• static electricity

• magnetism

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Which concept of force does this picture show?

• balanced forces

• unbalanced forces