A bullet has a mass of 5g leave a gun at a velocity of 100m/s. What is the kinetic energy of the bullet as it leave the gun? If the gun is fired vertically upwards, how high will the bullet go? (Ignore air resistance and assume g=10m/s2).

Answer 1

KE=1/2 m v^2=1/2 *.05kg*100^2

how high?
PEmax=KEmax
mgh=1/2 m v^2

h=1/2 *100^2 /9.8 m