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11 months ago

how much work does tension do on the laptop as it moves 2.0 mm ? express your answer with the appropriate units.

Physics

1 answer:

8090 [49]11 months ago

8 0

The work done by tension force of 14N applied on the laptop by a rope as it moves 2.0 mm up the slope is 0.028 J

W = F d cos θ

W = Work done

F = Force

d = Displacement

θ = Angle between force and displacement vector

F = 14 N

d = 2 mm = 0.002 m

θ = 0

W = 14 * 0.002 * 1

W = 0.028 J

Work done is the change in energy of an object. So if an object moves a certain distance, work is done on the object. If the force and displacement are perpendicular to each other there is no work done on the object.

Therefore, the work done by tension on the laptop is 0.028 J

To know more about work done

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2 years ago

If the second harmonic of a certain string is 42 Hz, what is the fundamental frequency of the string?

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Data:
$f_{2} = 42 Hz$
n (Wave node)
V (Wave belly)
L (Wave length)
<span>The number of bells is equal to the number of the harmonic emitted by the string.
</span>
$f_{n} = \frac{nV}{2L}$

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$f_{n} = \frac{nV}{2L}$
$f_{2} = \frac{2V}{2L} 
$
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$V = \frac{84L}{2}$
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If, We have:
V = 42L
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$f_{1} = \frac{V}{2L}$
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Answer:

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