Q1. A submarine is 306 m horizontally out from a shore and 120 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 245 m from the shore. If the beam now strikes the top of a building standing directly at the water's edge, find out the height of the building.
Q2. A 220 g block hangs from a spring with spring constant 9.0 N/m. At t=0s, the block is 28 cm below equilibrium point and moving upward with a speed of 110 cm/s. What is the block's position if the frequency is 1Hz at 2s?