A pendulum is pulled back to a height of 1.9 meters (position B in the diagram. How fast will it be moving when it reaches the bottom of its swing (position R)? Did my teacher write the question wrong because I see no way of finding a solution considering how he didn't provide a weight?

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.