Question

A body is moving with an initial velocity of 20 m/s. an acceleration -10 m/s2 is applied on it. Speed (in m/s) after 3 sec is

(A) -10m/s
(B) -20m/s
(C) 10 m/s
(D) 20m/s​

Answer 1

Answer:

A) -10m/s

Explanation:

Given,

Initial velocity (u) = 20 m/s

Acceleration (a) = -10 m/s²

time(t) = 3s

To Find :-

Final velocity (v)

Formula Required :-

v = u + at

Solution :-

v = 20 + (-10)(3)

v = 20 - 30

v = -10m/s

Final velocity = v = -10m/s.