A rectangular block is held against a rough vertical wall by applying a force of 200 n normal to the wall. If the frictional force just prevents the block from sliding down the wall, what is the mass of the block ? (the coefficient of static friction between the block and the wall is 0.49.)
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A block is pressed against a vertical wall by a force. ... Kinetic friction exists between the block and the wall, and the coefficient of ... (b) down the wall ... a) For the block to slide with.
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