Question

A vehicle is traveling at a velocity of 30 meters per second. Exactly 5 seconds later, its velocity has changed by a factor of 0.6. What was the vehicles average acceleration over that time period?

Answer 1

-2.4 m/s²

Step-by-step explanation:

avg accel = Δv/Δt

v-i = 30 m/s

v-f = (30 m/s)(0.60) = 18 m/s

Δt = 5.0 sec

avg accel = (18 m/s - 30 m/s) / 5.0 s = (- 12 m/s) / 5 s = -2.4 m/s²

negative sign means it's slowing down