Question

A steel ball is released from rest in a container of oil .its downward acceleration a=2,4-.6v , what is ball s downward velocity 2s after it is released

Answer 1

Explanation:

We are given

a = -2 m/s² (problem says the acceleration is downward, hence negative)

t = 2 s

u = 0 ( because problem says the ball is released from rest, which implies it was not moving initially)

By first kinematic equation of motion-

v = u + at

(Putting the values)

v = 0 + ( -2 x 2)

→ v = -4 m/s

Therefore, the ball will accelerate to

4 m/s downwards after 2 seconds