Question

Two bodies A and B have masses 20 kg and 5 kg, respectively. Each one is acted upon by a force of 2 kg wt. If they acquired the same KE in time ta and te then the ratio ta/tb is ​

Answer 1

Answer:

Given:

mA=20kg

mB=5kg

Kinetic Energy of both bodies and are the same. Thus,

1/2mAVA^2 = 1/2mBVB^2

VA^2/VB^2 = mB/mA

VA^2/VB^2 = 5/20

VA/VB = 1/2.

the ratio ta/tb is 1/2.