# Phys Sci Ch 11.1 Measuring Motion

### 19 terms by griswold Teacher

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### motion

a change in position relative to reference point

### frame of reference

a way to show precise location of object in space, time is:

### displacement

measures distance between start and end point

### speed

how fast object moves in a given time

### v=d/t

what is the formula for average speed?

### d=vt

what is the formula for distance?

### t=d/v

what is the formula for time?

### velocity

what is the speed of an object in a direction called?

### positive velocity

velocity of an object when it moves toward reference point

### negative velocity

velocity of an object when is moves away from reference point

### resultant velocity

addition of positive and negative velocities is called:

### constant speed

what speed is the speed when distance and time are equal?

### meters/second

what is the SI unit for speed?

### distance-time graph

the graph that shows speed of an object

### speed

what does the slope of a distance-time graph show?

### fast

if the slope on a distance-time graph is steep is the object travelling fast or slow?

### Zero Slope

what is the slope of an object thats not moving

### distance, y axis

what is the independent variable on a distance-time graph and which axis is it on?

### time, x axis

what is the dependent variable on a distance-time graph and which axis is it on?

Example: