Q. A submarine is 301 m horizontally out from the shore and 115 m beneath the surface of the water. A laser beam is sent from the sub so that it strikes the surface of the water at a point 210 m from the shore. If the beam just strikes the top of a building standing directly at the water's edge, find the height of the building.
Q. A 100 g ball on a 60 cm long string is swung in a vertical circle whose center is 200cm above the floor. The string suddenly breaks when it is parallel to the ground and the ball is moving upward. The ball reaches a height 600 cm above the floor.