A block of mass m = 331 g is dragged with a string across a rough horizontal table. The string tension is T = 2.47 N, and it pulls upward at an angle of ø = 42.0° with the horizontal. At one particular instant, the block is moving at a speed of v = 6.10 m/s. The coefficient of kinetic friction between the block and the table is uk = 0.609. m What is the power Pr supplied to the block by the string tension? PT = W What is the power Pf supplied by the force of friction? Pf = W At this instant, the block's speed is increasing. decreasing. O impossible to determine. constant.

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Chapter1: Units, Trigonometry. And Vectors
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A block of mass m =
331 g is dragged with a string across
a rough horizontal table. The string tension is T
2.47 N,
and it pulls upward at an angle of o = 42.0° with the
horizontal. At one particular instant, the block is moving
at a speed of v =
6.10 m/s. The coefficient of kinetic
friction between the block and the table is uk =
0.609.
m
What is the power Pr supplied to the block by the
string tension?
Pr
W
What is the power Pf supplied by the force of friction?
Pf
W
At this instant, the block's speed is
O increasing.
O decreasing.
impossible to determine.
constant.
Transcribed Image Text:A block of mass m = 331 g is dragged with a string across a rough horizontal table. The string tension is T 2.47 N, and it pulls upward at an angle of o = 42.0° with the horizontal. At one particular instant, the block is moving at a speed of v = 6.10 m/s. The coefficient of kinetic friction between the block and the table is uk = 0.609. m What is the power Pr supplied to the block by the string tension? Pr W What is the power Pf supplied by the force of friction? Pf W At this instant, the block's speed is O increasing. O decreasing. impossible to determine. constant.
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