Question

A ball is moving up an inclined plane, when it's velocity changes from 15m/s to 7m/s in 3 seconds . What is the acceleration.​

Answer 1

Explanation:

$a = \frac{change \: in \: velocity}{change \: in \: time}$

$a = \frac{v - u}{t}$

$v = 7 {ms}^{ - 1}$

$u = 15 {ms}^{ - 1}$

$t = 3 \: seconds$

$a = \frac{7 - 15}{3}$

$a = \frac{ - 8}{3}$

$a = - 2.67 \: {ms}^{ - 2}$