Question

An object is dropped from rest calculate its velocity after 2.5 s if it is dropped : a) on earth , where acceleration due to gravity is 9.8 m per sec sq b) On Mars where acceleration due to gravity is 3.8 m per sec sq

Answer 1

Answer a=24.5 b=9.5

Explanation:

Answer 2

Answer: a) 24.5 m/s

b) 9.5 m/s

Explanation:

acceleration = change in velocity / t

a = final velocity - initial velocity / t

a = v- 0 / t

v = a×t

Now on Earth a = 9.8 m/s^2

v = 9.8 × 2.5 = 24.5 m/s

Now on Mars a = 3.8 m/s^2

v = 3.8 × 2.5 = 9.5 m/s