Question

A body is moving vertically upwards. It's velocity changes at a constant rate from 50 m/s to 20 m/s in 3 seconds. What is its acceleration? *

Answer 1

Answer:

- 10 m/s^2

Explanation:

Using the first equation of motion :-

v  =  u + at

20  = 50 + a (3)

- 30  =  3a

a =  -30/3

a  = -10m/s^2

Answer 2

Answer:

Initial velocity = 50 m/s

Final velocity = 20 m/s

Time = 3s

Acceleration = (20 − 50)/3 ​ m/s^2

= -30/3

= -10m/s^2

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