Which statement includes a description of velocity?(1 point)

Question

A bicycle moves 8 meters per second.
A student walks 20 meters down the street.
A car travels east at 45 kilometers per hour.
A marble rolls 30 centimeters away from the table.

Answer 1

The statement that includes a description of velocity is: A car travels east at 45 kilometers per hour.

Velocity is defined as the speed of an object in a given direction, which this statement provides.

Answer 2

Which characteristic is constant for the car as it travels around the roundabout?
(1 point)
velocity
direction
speed
position

Answer 3

The characteristic that is constant for the car as it travels around the roundabout is speed.

While the car's direction is continuously changing as it moves around the roundabout, the speed can remain constant. Velocity would not be constant because it depends on both speed and direction, which are changing. Position is also changing continuously as the car moves.

Answer 4

On a position–time graph, which of the following does the value of the slope indicate about the object?
(1 point)
change in direction
velocity
total distance
change in position

Answer 5

On a position–time graph, the value of the slope indicates the velocity of the object.

The slope represents the rate of change of position with respect to time, which is the definition of velocity.