# Physics Ch. 10 Vocabulary

### 18 terms by mmarshall12

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### work

a force applied to an object which experiences displacement, increasing or decreasing the energy of a system---requires force and displacement, is done to something or on something,is partially along that line (force does not have to cause displacement)---the product of force and displacement

### energy

the ability to do work

### law of conservation of energy

all energy in the universe in constant and simply changes from one type to another

### kinetic energy

the energy of motion (scalar)

### work-energy theorem

the net work done on a system is equal to that system's change in kinetic energy

### power

the rate at which work in done on a system

### simple machine

can't be broken into parts, provide a mechanical advantage

the ratio of the output force to the input force

the ratio of distance in to distance out

### potential energy

stored energy that we may at some time use to do work (may not be used in stored form)

### gravitational potential energy

the energy stored in an object due to its position in a gravitational field

### reference point

place on frame of reference with 0 potential energy

### elastic potential energy

the amount of energy stored in a spring or other elastic material due to being deformed from its natural length

e=mc^2

### mechanical energy

the energy of a system contained as kinetic or potential

### conservation of mechanical energy

mechanical energy is only conserved when only gravity or elastic forces are doing work on the system

### conservative forces

gravity and spring force---when the tension is non-existent or perpendicular to the displacement, it does not work

Example: