# Science Final Assement, Mrs. Smith's Class

## 15 terms

a push or a pull

no

yes

N

100

### What 3 conditions must be met in order for work to be done?

FORCE APPLIED , OBJECT MUST MOVE, OBJECT MUST MOVE IN DIRECTION THE FORCE IS APPLIED

### A force can be exerted on an object without work being done because

SINCE FORCE IS WORK TIMES DISTANCE, IF THE OBJECT DOES NOT MOVE THEN THE DISTANCE WOULD BE ZERO AND ANYTHING TIMES ZERO IS ALWAYS ZERO

### Carrying an object that weighs 35 grams a distance of 1 km IS/IS NOT an example of work being done because

IS NOT WORK BECAUSE LIFTING AND HOLDING THE BOX UP IS AN UPWARD FORCE WHILE WALKING IS A HORIZONTAL FORCE SO THE APPLIED FORCE AND THE MOVEMENT OF THE OBJECT ARE IN OPPOSITE PLANES

### The formula for finding work is

FORCE x DISTANCE.

### The unit we use to measure work is

NEWTON-meters OR JOULES.

WORK ÷ time.

### The unit we use to measure power is

WATTS, JOULES/second OR NEWTON-meters/second.

SIMPLE
MACHINES

SIMPLE,COMPOUND

### lever is made up of these four parts

RESISTANCE FORCE OR ARM,
EFFORT FORCE OR ARM, FULCRUM, & A PLANK/BAR.