When you exert a force on an object that causes the object to move.
For work to happen, when a force is applied:
The joule measures:
Work depends on:
The rate that energy is transferred.
Power is measured in:
A device that makes work easier by changing the size or direction of the force.
The work you put into a machine.
The work a machine puts out.
The number of times the machine multiplies force.
A simple machine with a bar that pivots at a fixed point, called a fulcrum.
A wheelbarrow is an example of a______class lever.
Scissors would be an example of a _______ class lever.
A teeter-totter would be an example of a _______ class lever.
Your forearm would be an example of a _______ class lever.
A simple machine that has a grooved wheel that holds a rope or cable.
Block and tackle pulleys are very efficient because of the:
A simple machine with two circular objects of different sizes.
Turning the wheel on a wheel and axle results in a mechanical advantage because:
The greater the length is in relation to the height of an inclined plane, the___________the mechanical advantage is.
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