In April 1974, John Massis of Belgium managed to move two passenger railroad cars. He did so by clamping his teeth down on a bit that was attached to the cars with a rope and then leaning backward while pressing his feet against the railway ties.The cars together weighed 700 kN (about 80 tons). Assume that he pulled with a constant force that was 2.5 times his body weight, at an upward angle u of 30 from the horizontal. His mass was 80 kg, and he moved the cars by 1.0 m. Neglecting any retarding force from the wheel rotation, find the speed of the cars at the end of the pull.

*15-132. Sand is deposited from a chute onto a conveyor belt which is moving at 0.5 m/s. If the sand is assumed to fall vertically onto the belt at A at the rate of 4 kg/s, determine the belt tension Fg to the right of A.The belt is free to move over the conveyor rollers and its tension to the left of A is Fc= 400 N. 0.5 m/s Fc = 400 N

(B) A maintenance man (climber) tries to maintain one of the power stations located at thetop of the mountain in the situation of winter. During his work and by mistake drops hiswater bottle which then slides 100 M down the side of a steep icy slope to a point which is10 m lower than the climber's position. The mass of the climber is 60 kg and his water bottlehas a mass of 500 g.1) If the bottle starts from rest, how fast is it travelling by the time it reaches the bottomof the slope? (Neglect friction.)What is the total change in the climber's potential energy as she climbs down the mountainto fetch her fallen water bottle? i.e. what is the difference between her potential energy atthe top of the slope and the bottom of the slope? Analysis all the above situation.