# motion speed and velocity

### 12 terms by dianeyi09

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### Frame of reference

is a system of objects that are not moving with respect to one another

### Speed

is the ratio of the distance an object moves to the amount of time the object moves

### Instantaneous speed

is computed for the entire duration of a trip, instantaneous speed is measured at a single moment., the speed of an object at one instant of time

### Constant speed

speed that does not change

### Average speed

a rate of motion determined by dividing the total distance traveled by the total travel time

### Slope

the property possessed by a line or surface that departs from the horizontal

### Velocity

distance travelled per unit time

### Acceleration

The rate at which velocity changes

### Deceleration

a decrease in speed

### D-t graph

distance time graph

### V-t graph

velocity time graph

### Units for speed, acceleration, distance, velocity

m/s, m/s squared, m, mph, km/hr, m/s

Example:

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