﻿ A shell of mass 200 g is ejected from a gun of mass 4 g by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is from Physics Laws of Motion Class 11 Manipur Board

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A shell of mass 200 g is ejected from a gun of mass 4 g by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is

• 100 ms-1

• 80 ms-1

• 40 ms-1

• 120 ms-1

A.

100 ms-1

In the given problem conservation of linear momentum and energy hold good.
Conservation of momentum yields.

m1v1 + m2v2 = 0
4v1 + 0.2 v2  = 0

Conservation of energy yields

In the given problem conservation of linear momentum and energy hold good.
Conservation of momentum yields.

m1v1 + m2v2 = 0
4v1 + 0.2 v2  = 0

Conservation of energy yields

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