STANDARDPhysics-Work, Energy and Power
STANDARD Physics Kinetic Energy MCQ Question
Type: MCQ-numerical-Medium-Class 11
Two bodies A and B have masses 20 kg and 5 kg respectively. Each one is acted upon by a force of 4 kg wt. If they acquire the same kinetic energy in times tₐ and tᵦ, then the ratio tₐ/tᵦ is
A
1/2
B
2
C
2/5
D
5/6
Correct Answer
Option B
Detailed Explanation
Using the relation for kinetic energy and the given forces, we find that the accelerations are aₐ = 2 ms⁻² and aᵦ = 8 ms⁻². Solving for the times using the kinetic energy equation, we find tₐ/tᵦ = 2.
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