Question

1-a 10.0 kg weight, arranged so it will turn a paddle wheel I said falls, is allowed to fall through a distance of 2.5 M. The paddlewheel stairs a container holding 850 G of water. assuming all of the potential energy from the weight goes into the heat energy in the water, calculate the increase in temperature of the water.( Cwater = 4186 J/kg Co)

2- A 45 kg box is pushed 17.4m upA frictionless plane at an angle of 37o above The horizontal. Calculate its increase in potential energy.

Answer 1