The kinetic energy of a moving object is KE = 1/2 mv2, where m is the mass and v is the speed. An average apple has a mass of 0.16 kg. How fast must the apple travel in m/s to have kinetic energy of 0.69 million joules?
KE = 1/2 mv2
690000 = 1/2 (.16)v2
sqrt [690,000 *2 /(.16) ] = ........ m/s
+70 
