Question

A body is moving with a speed of 20 m/s. When a certain force is applied, an
acceleration of 4 m/s” is produced. After how much time will its velocity become
80 m/s?

Answer 1

Answer:

(T) = 15 seconds is the correct answer

Answer 2

So the time will be 15 seconds

EXPLANATION :

initial speed u = 20 m/s

final speed v = 80 m/s

Acceleration a = 4 m/s^2

v= u x at

=> t = (v - u)/a

=> t = 60/4 = 15 secs