Question

A car advertisement states that a certain car can accelerate from rest to 30 km/h in
6 seconds. Find the car’s average acceleration.

Answer 1

Explanation:

Explanation:

The acceleration of an object can be calculated based on the formula

a=v−ut

where

a=acceleration

v=final velocity

u=initial velocity

t=time taken

Here

70 km/h=70 km1 h⋅1 h3600 s⋅1000 m1 km=1949 m/s

From the question

u=0 m/s

v=1949 m/s

t=7 s

So

a=1949 m/s−0 m/s7 s

a=279 m/s2