Question

A car moving with a speed of 15 m/s can be stopped by applying
brakes, after travelling a distance of 3m. The retardation of the car is
1) 37.5m/s² 2) 47.5m/s² 3) 57.5m/s² 4) 67.5m/s​

Answer 1

Explanation:

SOLUTION~

As we know ,

v^2 = u^2 + 2as

0^2 = 15^2 + 2 × a × 3

0 = 225 + 6a

-225 = 6a

-225/6 = a

-37.5 = a

therefore the retardation of the car is -37.5m/s^2

Answer 2

QUESTION:

A car moving with a speed of 15 m/s can be stopped by applying brakes, after travelling a distance of 3m. The retardation of the car is.

ANSWER:

37.5m/s²