Speed and velocity

A distance-versus-time graph will never show a horizontal line

False, it will never show a vertical line

The slope of a line is found by multiplying the rise by the run

False, it is found by dividing

The SI unit for speed is m/min.

False, it is m/ hr.

On a distance-versus-time graph, a straight line indicates that an object's speed is zero

False, it is not zero it is constant (same)

A speedometer shows the instantaneous speed of a vehicle

True

Fluffy ran the 1,000-meter race in 2.5 minutes. Fluffy's average speed was 400 m/min.

True

On a distance-versus-time graph, a speed of zero would appear as a horizontal line.

True

Speed in a given direction is called velocity

True

Speed+direction=velocity

True

The average speed of an object is found by dividing the total distance by the total time

True

To describe an object's motion, you need know both its speed and its direction

True