Question 6

6. Gravitational and elastic potential energy. A worker with a mass of my = 60 kg observes that her truck lowers 21 = 1.6 cm (0.016 m) when she enters the driver seat (her truck suspension obeys Hooke's law for springs). At the job site a crane places a my = 500 kg palette of cement into the back of the truck. The crane operator releases the palette so it contacts the truck bed with a downward speed of v = 0.5 m/s. The truck bounces around for a while and dissipates energy through friction until it stops moving. Find the work done by friction as the truck and its load come to rest. The mass of the truck itself can be ignored for this calculation