Question

a projectile has a momentum of 1.6 x 10^4 kg-m/s and a velocity of 200 m/s. What is its mass and its weight?

Answer 1

Since the momentum of a projectile is conserved only in horizontal direction while the momentum is not conserved in vertical direction because the net force in vertical direction is not zero.

Velocity of projectile$(u)=200m/s$

Momentum of projectile = $1.6\times10^4kg.m/s$

Mass of the body$=\dfrac{1.6\times10^4}{200}=80\space kg$

Weight of the body = $mg=80\times9.8=784\space N$