Which falling object has the least kinetic energy when it collides on the ground? a 120 Kg of sand falling 12 m/s b 12 Kg of sand falling at 8 m/s c 120 Kg of water falling at 12 m/s d 12 Kg of water falling at 10 m/s
d) 12 Kg of water falling at 10 m/s
To calculate the kinetic energy of each object, we use the formula:
KE = 0.5 * mass * velocity^2
a) KE = 0.5 * 120 * 12^2 = 8640 J
b) KE = 0.5 * 12 * 8^2 = 384 J
c) KE = 0.5 * 120 * 12^2 = 8640 J
d) KE = 0.5 * 12 * 10^2 = 600 J
Therefore, the object with the least kinetic energy is option d) 12 Kg of water falling at 10 m/s.