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What is the equation for power?
40.5 W
Force moves an object
Work divided by time.
Screw
True
Work is done when force exerted on an object causes it to move.
A fixed pulley changes the direction of the input force.
Fulcrum
A ___________ is an inclined plane around a cylinder or post.
40.5 W
Force moves an object
Work divided by time.
Screw
True
Work is done when force exerted on an object causes it to move.
A fixed pulley changes the direction of the input force.
Fulcrum
Which of the following is a requirement for work to be done?
40.5 W
Force moves an object
Work divided by time.
Screw
True
Work is done when force exerted on an object causes it to move.
A fixed pulley changes the direction of the input force.
Fulcrum
Ture or False? Efficiency equals the output work, divided by the input work times 100%.
40.5 W
Force moves an object
Work divided by time.
Screw
True
Work is done when force exerted on an object causes it to move.
A fixed pulley changes the direction of the input force.
Fulcrum
What is a fixed pulley?
40.5 W
Force moves an object
Work divided by time.
Screw
True
Work is done when force exerted on an object causes it to move.
A fixed pulley changes the direction of the input force.
Fulcrum
What is work?
40.5 W
Force moves an object
Work divided by time.
Screw
True
Work is done when force exerted on an object causes it to move.
A fixed pulley changes the direction of the input force.
Fulcrum
What does a second class level consist of?
40.5 W
Force moves an object
Work divided by time.
Screw
True
Work is done when force exerted on an object causes it to move.
A fixed pulley changes the direction of the input force.
Fulcrum
The work done by a boy pulling a snow sled up a hill is 425 Joules. What is the power expended by the boy if the he pulls on the sled for 10.5 seconds?
40.5 W
Force moves an object
Work divided by time.
Screw
True
Work is done when force exerted on an object causes it to move.
A fixed pulley changes the direction of the input force.
Fulcrum
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