1.
A piece of wood of mass 0.03 kg0.03\,\text{kg} is dropped from the top of a 100 m100\,\text{m} height building. At the same time, a bullet of mass 0.02 kg0.02\,\text{kg} is fired vertically upward, with a velocity 100 ms−1100\,\text{ms}^{-1}, from the ground. The bullet gets embedded in the wood. Then the maximum height to which the combined system reaches above the top of the building before falling below is: (g=10 ms−2g = 10\,\text{ms}^{-2})