work quiz study guide 7th grade
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is work? | The transfer of energy to an object by using a force that causes the object to move in the direction of the force
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| What is the formula for work? | W=f*d
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| What 2 things must happen to do work on an object? | The object moves as a force is applied and the direction of the object's motion is the same as the direction of the force
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| What is the unit for measuring work? | Joules or newton-meter (n*m)
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| What is power? | The rate at which energy is transferred
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| What is the unit for calculating power? | Watts or joules per second (J/s)
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| What is the formula for calculating power? | P=w/t
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| What is Kinetic Energy? | The type of energy a moving object has
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| Is work being done- Holding a heavy dog in place? | No
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| Is work being done- pulling a nail out of wood and the nail is not moving? | No
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| Is work being done- Carrying a backpack across a room? | No
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| Is work being done- Lifting a backpack from the floor to a table? | Yes
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| Is work being done- Walking up stairs? | Yes
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| Is work being done- Hammering a nail into wood? | Yes
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