A .5kg firecracker is ignited and then thrown into the air at 16m/s. Aprox. 1.2 seconds later, the firecracker explodes. What is the net momentum of the firecracker pieces after it explodes?

Question

A .5kg firecracker is ignited and then thrown into the air at 16m/s. Aprox. 1.2 seconds later, the firecracker explodes. What is the net momentum of the firecracker pieces after it explodes?

Answer 1

Mass = m = 0.5Kg

Vi = 16m/s

Vf = ?

vf - Vi = -gt

vf = 16 - g* 1.2 = 16 - 9.8 *1.2 = 4.24 m/s

Momentum of fire cracker = 0.5 * 4.24 = 2.12 kgm/s

This is momentum begore Explosion

Momentum after explosion will be same for all pieces ( combined momentum after Explosion)