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Problem 2 A 15 foot chain is hanging from a winch 15 feet above the ground level. Find the work done by the winch in winding up at constant speed the entire chain with a 500 lb attached to it if the chain weighs 3 lbs/ft (A See Example 4 page 479 in your book) Problem 3 A cylindrical tank 4 meters high with a radius of2 meters is buried so that the top of the tank is 1 meter below ground level. How much work is done in pumping a full tank of water up to the ground level if the water weighs 9800 Newton per cubic meter? (See Example 5 page 480 in your book) Problem 4 A container is in the shape of water trough with equilateral triangles of sides 2 ft located at the vertical ends. If the trough contains a chemical that weighs 75 lbs cubic foot, find the fluid force at one vertical end.

 

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