Question

a firecracker explodes into two equal parts the velocity of one part is 20m/s what is the velocity of the other piece

Answer 1

Answer:

If the firecracker will explodes into two equal parts their masses will be same on both the sides.

• m = m₁ = m₂

=> Initial momentum = 0

=> Final momentum = 0

=> P = 0

=> mv₁ + mv₂ = 0

=> m(v₁ + v₂) = 0

=> v₁ + v₂ = 0

=> v₁ = -v₂

=> 20 = -v₂

=> v₂ = -20 m/s

Hence, the Option C) -20 m/s is the correct answer.