Question

A bomb of mass 16 kg at rest explodes into two pieces of masses 4kg and 12kg. the velocity of the 12k
mass is 4ms". The K.E of the other mass is:​

Answer 1

Answer:

I think 288 J

carry on.....

Answer 2

total mass= 16 kg

mass of piece 1 = 4kg

Velocity of piece 1 = ?

mass of piece 2 = 12kg

Velocity of piece 2 = 4m/s

Momentum of piece 2 = 12x4 kg m/s

By momentum conservation,

Momentum of piece 2 = momentum of piece 1

12 ×4 = 4 × v

v = 12 m/s

Velocity of piece 1 = 12m/s

KE of piece 1 = ½ × 4 × 12² joule = 288 joule (ans)

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