Question

A car increases its speed along a straight road from 20.0 km/h to 50.0 km/h in a time of 5.0 s.

What is the magnitude of the acceleration of the car?
O A 3.0 (km/h)/s
B. 6.0 (km/h)/s
C. 7.0 (km/h)/
D. 10.0 (km/h/s

Answer 1

Final speed - Initial speed / time.
50.0 - 20.0 / 5.0
30.0 / 5.0
= 6.0 (km/h)/s
Correct choice is B.