Respuesta :

To determine the mass of the bullet, remember the equation for calculating kinetic energy is

KE = 1/2mv^2.

900 = 1/2m(500)^2

900 = 1/2 • 250 000 m

900 = 125 000m

m = 900/125 000 = 9/1250 = 0.0072 kg.

This would be the mass if the bullet.