Changing Speed and Direction

Which of the following is an example of a FORCE?

• Aaron pushes the pedal down with his foot.

• A big rock on top of a hill.

• Leaves changing color during fall.

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How can a person move faster?

• Use more force

• Use less force

• Use the same force

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True or False: The bike will keep going straight until a force makes it change direction.

• True

• False

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Aaron pushes the handlebars to the right. Where will the bike turn?

• The bike will turn around.

• The bike will turn left.

• The bike will turn right.

What happens to objects when it moves uphill?

• It will go faster.

• It will slow down.

• Speed will remain the same.

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What force is slowing down objects when moving uphill?

• gravity

• energy

• electricity

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How do objects move downhill?

• It will move faster with the help of gravity.

• It will move slower with the help of gravity.

• Speed will remain the same.

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What do you call the process where objects are gaining speed?

• Acceleration

• Decceleration

• Gravity

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What kind of force that makes objects slow down?

• Gravity

• Friction

• Speed

What is friction?

• Friction is when objects move against each other.

• Friction is when objects move together.