What is the work completed by friction

Reference no: EM1318809

Q1. To pump 100Joules of heat from the ice cube tray of freezing water at 273K, out into a hot room at 310 K, the laws of thermodynamics say that you will need at least how many Joules of ordered energy or work?

Q2. A 50.0 kg (including the passenger) sled is subject to a net force of 20.0N pushing in the direction of the sled's motion as it is moving over a horizontal surface for a distance of 11.0 m after having started from rest. At this point the sled is released as it starts down a 10° incline. However, the snow is not very deep, and the sled stops after having moved an additional 35.0m. What is the work completed by friction while the sled is on incline?

Reference no: EM1318809

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