A crew of workers is renovating an office building. One day, they tear out pieces of wall and throw them into a trash bin two stories below. Brian tosses down a piece that has a mass of 12 kg. Alexis throws down a piece with a mass of 30 kg. Hank throws down a piece with a mass of 24 kg. All of the pieces fall at the same velocity of 6 m/s. Who tossed the piece with a kinetic energy of 432 J?

Question

anonymous · Answer

Use the formula for the kinetic energy
K.E=1/2*m*v^2
put in the value of K.E given, the speed and find the mass.