Question

position, distance, and displacement quick check
which statement includes a description of velocity? (1 point)
a bicycle moves 8 meters per second.
a car travels east at 45 kilometers per hour.
a student walks 20 meters down the street.
a marble rolls 30 centimeters away from the table.

Explanation:

Velocity is a vector quantity that includes both magnitude and direction.

• "A bicycle moves 8 meters per second" only gives magnitude (speed).
• "A car travels east at 45 kilometers per hour" gives both magnitude (45 km/h) and direction (east), which is velocity.
• "A student walks 20 meters down the street" and "A marble rolls 30 centimeters away from the table" are about distance (scalar, no direction for velocity - like just how much ground covered not direction - speed concept in a way for these).

Answer:

A car travels east at 45 kilometers per hour.