Calculate the kinetic energies of the following objects moving at the given speeds : ( a ) a 91 kg football linebacker running
at 8.9 m / s ; ( b ) a 4,9 g bullet at 807 m / s ; ( C ) Carrier Moritz , 91,400 metric tons at 23 knots . ( 1 metric ton - 1000 kg , 1 knot - 0.514 m / s )
