4.1 Speed & Energy Review

energy transfer is

• The movement of energy from one object or material to another

• What is needed to do work or cause change

• Rate of motion

• Change in position or location

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gravity is

• a push and pull

• a downward pull toward the earth's surface

• the transfer of energy from one object to another

• what causes an object to work

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the rate of motion is

• speed

• movement

• gravity

• force

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what is energy

• a push or pull

• the rate of motion

• the change in postion or location

• What is needed to do work or cause change

A kid play tug of war against an adult is a _______ force.

• balanced

• unbalanced

What will happen when unbalanced forces battle against each other?

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If a car is let go to roll down a ramp from 5 cm of elevation and it rolls 8 cm and the same car is let go from the same ramp at 10 cm of elevation and it rolls 14 cm what would be a reasonable prediction of what would happen if the same car was let go from the same ramp at 15 cm of elevation?

• it would go the same distance

• it would go a longer distance

• it would go a shorter distance

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Which scenario describes an object using the most energy?

• a racecar on a track moving 20 mph

• an identical car moving 40 mph

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Which scenario describes an object using the most energy?

• a baseball thrown by a professional baseball player

• a baseball thrown by a child

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Which scenario describes an object using the most energy?

• A skydiver that is falling at 80 kilometers per hour

• A skydiver that is falling at 95 kilometers per hour

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