Question

A racecar driver accelerates many times during a race. If a driver accelerates from 70m/s to 100m/s in 1.5 seconds before making a turn, what is the acceleration on the driver?
A. 30ms2
B. −30ms2
C.  20ms2
D. −20ms2

Answer 1

A=(vf-v₀)/t

Data:
vf=100 m/s
v₀=70 m/s
t=1.5 s

a=(100 m/s - 70 m/s)/1.5 s=30 m/s / 1.5 s=20 m/s².

answer:  C. 20 m/s²