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How are work and power related?
Power is how fast work happens.
LIfting three 20 N weights 3 meters off the floor
1,200 joules
25 j
divide the amount of work completed by the time it takes to do the task.
joules
car engine
watt
A man pushes a crate with a force of 30 N. He pushes it for 40 meters. How much work does he do?
Power is how fast work happens.
LIfting three 20 N weights 3 meters off the floor
1,200 joules
25 j
divide the amount of work completed by the time it takes to do the task.
joules
car engine
watt
Units used to express work in an equation are
Power is how fast work happens.
LIfting three 20 N weights 3 meters off the floor
1,200 joules
25 j
divide the amount of work completed by the time it takes to do the task.
joules
car engine
watt
You lift up a 50 N chair to a height of 0.5 m and carry it 10 m across the room. How much work did you do?
Power is how fast work happens.
LIfting three 20 N weights 3 meters off the floor
1,200 joules
25 j
divide the amount of work completed by the time it takes to do the task.
joules
car engine
watt
To calculate power, you
Power is how fast work happens.
LIfting three 20 N weights 3 meters off the floor
1,200 joules
25 j
divide the amount of work completed by the time it takes to do the task.
joules
car engine
watt
Which of the following is NOT a simple machine?
Power is how fast work happens.
LIfting three 20 N weights 3 meters off the floor
1,200 joules
25 j
divide the amount of work completed by the time it takes to do the task.
joules
car engine
watt
Power is expressed in joules/second, also known as the
Power is how fast work happens.
LIfting three 20 N weights 3 meters off the floor
1,200 joules
25 j
divide the amount of work completed by the time it takes to do the task.
joules
car engine
watt
In which of the following situations would you do the most work?
Power is how fast work happens.
LIfting three 20 N weights 3 meters off the floor
1,200 joules
25 j
divide the amount of work completed by the time it takes to do the task.
joules
car engine
watt
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