Question #65b41

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Question #65b41

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Answer 1 · 2017-12-21T11:29:47

0.086N

Explanation:

This is easiest to solve by recognising that the nurse is doing work on the mass which results in a transfer of energy into kinetic energy
$F \times S = \frac{1}{2} m v^{2}$ $FtimesS= 1/2mv^2$
Rearranging
$F = \frac{m v^{2}}{2 S}$ $F=(mv^2)/(2S)$

Substituting in:
$F = \frac{(3 \times 10^{- 3}) \times ({1.4}^{2})}{2 \times 0.034} = 0.086 N$ $F=((3times10^-3) times (1.4^2))/(2 times 0.034)=0.086N$

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Question #65b41

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