Work, power, and energy are all important concepts in physics. These flashcards cover some basic terms and formulas used in this area of physics.
There are 20 flash cards in this set (4 pages to print.)
To use:
1. Print out the cards.
2. Cut along the dashed lines.
3. Fold along the solid lines.
Sample flash cards in this set:
| Questions | Answers |
|---|---|
| work | when a force causes an object to move in a direction of the force |
| joule | the unit used to express work, also called the Newton meter |
| power | the rate at which work is done |
| watt | the unit used to express power, also joules per second |
| machine | a device that helps make work easier by changing the size or direction of the force |
| mechanical advantage | tells you how many times the machine multiplies force |
| formula for power | P = W/t |
| formula for mechanical advantage | MA = output force/input force |
| work input | the work you do on a machine |
| work output | the work done by the machine |
| mechanical efficiency | a comparison of a machine's work output with the work input |
| lever | a simple machine consisting of a bar that pivots at a fixed point called a fulcrum |
| compound machine | machines that are made out of two or more machines |
| inclined plane | a simple machine that is a straight slanted surface |
| wedge | is a double inclined plane that moves |
| screw | is an inclined plane that is wrapped in a spiral |
| wheel and axle | a simple machine consisting of two circular objects of different sizes |
| pulley | is a simple machine consisting of a grooved wheel that holds a rope or cable |
| formula for mechanical efficiency | work output/ work input |
| formula for work | W=F x d |
