A 20 kg wagon is pulled with a force of 90 N. Ground friction provides 20 N of force in the opposite direction. What is the weight of the wagon?

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

The amount of potential energy possessed by an elevated object is equal to what?

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.