Question

A shell of mass 10 kg is moving with a velocity of 10 ms^–1 when it blasts and forms two parts of mass 9 kg and 1 kg respectively. If the I^st mass is stationary, the velocity of the II^nd is :

• A. 1 m/s
• B. 10 m/s
• C. 100 m/s
• D. 1000 m/s

Answer 1

Answer: (C)

100 m/s

Answer 2

${\overset{\rightarrow}{P}}_{before} = {\overset{\rightarrow}{P}}_{after}$

or (10) (10) = 9(0) + 1(v)

\ v = 100 m/s