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A block of mass m = 353 g is dragged with a string across a rough horizontal table. The string tension is T = 3.27 N, and it pulls upward at an angle of ? = 44.0° with the horizontal. At one particular instant the block is moving at a speed of v = 5.7 m/s. The coefficient of kinetic friction between the block and the table is ?k = 0.684.
What is the power supplied to the block by the string tension?
____________ W
What is the power supplied by the force of friction?
At this instant the block's speed is...
a) increasing
b) decreasing
c) constant
d) impossible to determine
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