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Q. A submarine is 325 m horizontally out from the shore and 115 m beneath the surface of the water. A laser beam is sent from the submarine so that it strikes the shore. If the beam strikes the top of a building standing directly at the water's edge, find the height of the building.

Q. A shop sign weighing 245 N is supported by a uniform 155N beam. Find the tension in the guy wire and the horizontal and vertical forces exerted by the hinge on the beam.

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Category:- Physics
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