1) A 3.00-kg block is placed at the top of a track consisting of two frictionless quarter circles of radius R equal to 1.54 m connected by a 7.00-m-long, straight, horizontal surface (see the figure below). The coefficient of kinetic friction between the block and the horizontal surface is μkμk equal to 0.100. The block is released from rest. 1) Find where the block stops, as measured from the left end of the horizontal surface, marked x = 0 on the figure. (Express your answer to three significant figures.)
2)A bicyclist maintains a constant speed of 4.00 m/s up a hill that is inclined at 10.0∘ with the horizontal. Calculate the work done by the person and the work done by gravity if the bicycle moves a distance of 18.0 m up the hill. The combined mass of the rider and the bike is 81.0 kg.1)Calculate the work done by gravity. (Express your answer to three significant figures.)2)Calculate the work done by the person. (Express your answer to three significant figures.)