Question

A car increases velocity from 30 misto 50 m/s in 4 seconds. Calculate the average acceleration of the car over this time

7.5 m/s2
0.3 m/s2
4.8 m/s2
0.6 m/s2

Answer 1

Answer:

5 m/s^2

Explanation:

By definition of average acceleration,

$a = {\Delta v \over \Delta t$ Let's replace what we know, remembering that $\Delta v = 50 - 30 = 20 m/s$

$a= {{20 m/s} \over 4s} = 5 m/s^2$