Question

A body is thrown up with a velocity of 20 m/s. it retards uniformly at the rate of 10 m/s2.find the velocity of the body after 2 sec.​

Answer 1

Initial velocity (u) = 20 m/s

Acceleration (a) = - 10 m/s2

Time (t) = 2 seconds

Final velocity (v) = ?

We know, v = u + at

or, v = 20 + ( - 10) X 2 or, v = 0 m/s

Therefore, the final velocity (v) is 0 m/s.