JEE Main Physics question

Physics Work, Energy and Power JEE Main

If the kinetic energy of a body increases by 0.1%, the percent increase of its momentum will be

(A)0.05%Correct
(B)0.1%
(C)1.0%
(D)10%

Answer: (A)

Solution

p ∝ √E, so (by differentiating) the percentage change in p is half the percentage change in E: ½ × 0.1% = 0.05%.

Question ID VK-153933