a car changes speed from 15m/s to 8m/s in 20 seconds. calculate the acceleration

Question

calculate the acceleration.

Answer 1

An initial velocity (v₁) of car is 8m/sec and the final velocity (v₂) of car is 15m/sec.

The formula for acceleration a = change of velocity (dv) / time (t).

The change of velocity (v₂ - v₁) = 15 - 8 = 7 m/s.

The time (t) is 20 seconds.

Subtitute the value of dv = 7 m/s, t = 20s in the acceleration formula.

a = 7 / 20 = 0.35 m/sec^2.

The solution is 0.35 m/sec^2.