Question

1. A ball starts moving with an acceleration of 4 m/s2. Find out its speed after 4 seconds.​

Answer 1

Explanation:

a=4m/s

time= 4sec.

speed = 4×4 = 16m

Answer 2

Explanation:

Given:

acceleration (a) = 4m/s²

time (t) = 4 sec

Solution:

According to Newton's 1st equation

v = u + at

(Ball's initial velocity will be zero as the ball is just started but before that it was at rest)

v = 0 + 4 × 4

v = 0 + 16

v = 16 m/s