Home Physics Work, Energy, Power and Collision Conservation of Energy and Momentum A bomb of mass m is moving in x direction wi…
Physics Work, Energy, Power and Collision Conservation of Energy and Momentum MCQ (Single Correct)

A bomb of mass m is moving in x direction with velocity u when it separates into masses m and m moving horizontally in the same plane. If an additional energy of Amu 1 is generated, the relative speed of two masses is

A
3u
B
4u
C
6u
D
8u.

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Text Solution

Verified by Experts
The correct answer is:
C

By conservation of momentum

mu =

or 3u = u 1 + 2u 2 ………. (i)

also, additional energy

=

or 4mu 2 = + -

or 24mu 2 = mu 1 2 + 2mu 2 2 – 3mu 2

or 27mu 2 = mu 1 2 + 2mu 2 2

Solving (i) and (ii) u 1 = 5u and u 2 = -u

∴ ∴ Relative velocity = 5u - (-u) = 6u

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