A bomb of mass 9 kg initially at rest explodes into two pieces of mass

1.	A bomb of mass 9 kg initially at rest explodes into two pieces of masses 3 kg and 6 kg. If the kinetic energy of 3 kg mass is 216J, then the velocity of 6kg mass will be (1) 4 m/s (2) 3 m/s (3) 2 m/s (4) 6 m/s
Answer» (4) 6 m/s Using conservation of momentum M₁V₁ = M₂ V₂ 3 x V₁ = 6 x V₂ ........ (i) 1/2 x 3 x v²₁ = 216 ⇒ V₁ = 12 m/s ; V₂ = 6 m/s

A bomb of mass 9 kg initially at rest explodes into two pieces of masses 3 kg and 6 kg. If the kinetic energy of 3 kg mass is 216J, then the velocity of 6kg mass will be (1) 4 m/s (2) 3 m/s (3) 2 m/s (4) 6 m/s

Answer»

(4) 6 m/s

Using conservation of momentum

M₁V₁ = M₂ V₂

3 x V₁ = 6 x V₂ ........ (i)

1/2 x 3 x v²₁ = 216

⇒ V₁ = 12 m/s ;

V₂ = 6 m/s

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A bomb of mass 9 kg initially at rest explodes into two pieces of masses 3 kg and 6 kg. If the kinetic energy of 3 kg mass is 216J, then the velocity of 6kg mass will be (1) 4 m/s (2) 3 m/s (3) 2 m/s (4) 6 m/s

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