Question

A bomb of mass 16 kg at rest explodes into two pieces of masses 4 kg and 12 kg. The velocity of the 12 kg mass is 4 ms1. The kinetic energy of the other mass is

Answer 1

Here,

M = 4 kg

m = 12 kg

U = ?

u = 4 m/s

As momentum is conserved

MU = mu

U =$\dfrac {mu}{M}$

$= \frac{12 \times 4}{4} = 12$

Kinetic energy

$= \: \frac{1}{2} \times m \times u {}^{2} \\ \\ = \frac{1}{2} \times 4 \times (12) {}^{2} \\ \\ = 288 \: j$

Answer 2

Answer:

the answer for this question is 288 J