Question

A car brakes from 100 m/s to 5 m/s in 100 meters. Is this an example describing velocity, speed, or acceleration?

a) Velocity
b) Speed
c) Acceleration
d) None of the above

Answer 1

The car's velocity is changing, indicating acceleration.

Step-by-step explanation:

The car's initial velocity is 100 m/s and it slows down to a final velocity of 5 m/s over a distance of 100 meters. To determine the subject of this example, we need to consider the definition of velocity, speed, and acceleration. Velocity is a vector quantity that includes both magnitude (speed) and direction. Speed is a scalar quantity that only includes magnitude. Acceleration is the rate of change of velocity. In this example, the car's velocity is changing from 100 m/s to 5 m/s, so the correct answer is c) Acceleration.