A force of 88 N is used to move a couch 2.1 m. How much work is done?

1 answer:

7 0

$Given:\\F=88N\\s=2.1m\\\\Find:\\W=?\\\\Solution:\\\\W=\overrightarrow{F}\circ\overrightarrow{s}\\\\In\;these\;case\\\\W=Fs\;\;\;\;because\;\angle(\overrightarrow{F},\overrightarrow{s})=0\\\\W=88N\cdot 2.1m=184.8J\\\\Correct\;answer\;is\;A$

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A student pulls a block over a rough surface with a constant force FP that is at an angle θ above the horizontal, as shown above

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Explanation:

The force of friction is given by

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