Question

A body moving along a straight line with a velocity 20m/s undergoes an acceleration of -4 m/s2 .After 2s its speed will b

Answer 1

Answer:

12m/s

Explanation:

Since: initial velocity at 0 sec is 20m/s and the acceleration is -4m/s.

The velocity after 1 sec will be 20m/s - 4m/s i.e. 16m/s.

And the velocity in the next sec will be 16m/s -4m/s i.e. 12m/s. That's the answer