3.8B Mechanical Energy & Speed

What is the definition of mechanical energy?

• the energy of an object due to its motion or position

• the energy of sound

• the energy of light

• the energy of temperature

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Students are skateboarding, and there are two ramps to choose from. Which ramp would allow the students to go fastest?

• Ramp 1
• Ramp 2
• Students going down the ramps will have the same speed.
• There is no way to determine which ramp will allow a faster speed.

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Which of these items has the LEAST speed and mechanical energy?

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A measure of how fast something moves over a certain distance is ________________.

• motion

• speed

• work

• force

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Which object would have the MOST speed?

• toy car going down a ramp

• A toy car resting on the ground

• A toy car at the bottom of a ramp

• A toy car underwater

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Which of the following is NOT a way to increase the speed and mechanical energy of an object?

• Push it forward

• Push it down a ramp

• Put it on wheels and push it forward

• Add more weight to it to make it heavier

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Do the vegetables and water in this pot have mechanical energy?

• Yes the water and vegetables are moving.

• No the water and vegetables stay in the pot.

Which of the following is not an example of mechanical energy?

• A ball rolling down a hill.

• A person flying a kit.

• Sun streaming through an open window.

• A person riding a bike.

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What would you do to increase your speed on a bicycle?

• I would increase my speed by pedaling more quickly.

• I would increase my speed by pedaling more slowly.

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Which tool would be most useful for determining speed?

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