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Elden [556K]
3 years ago
9

A block and tackle pulley system of 6 pulley uses 300N to overcome 1200N.find efficiency

Physics
1 answer:
Fittoniya [83]3 years ago
4 0

Answer:

66.7%

Explanation:

There are 6 pulleys, so the mechanical advantage is 6.

The theoretical force needed to overcome 1200 N is therefore:

1200 N / 6 = 200 N

The actual force is 300 N.  So the efficiency is:

200 N / 300 N × 100% = 66.7%

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Explanation:

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Fundamental frequency is, f_1=\dfrac{1}{2L}\sqrt{\dfrac{T}{\mu_1}}.....(1)

Lower frequency is, f_2=\dfrac{1}{2L}\sqrt{\dfrac{T}{\mu_2}}..............(2)

Dividing equation (1) and (2) as :

\dfrac{f_1}{f_2}=\sqrt{\dfrac{\mu_2}{\mu_1}}

\dfrac{\mu_2}{\mu_1}=(\dfrac{f_1}{f_2})^2

\dfrac{\mu_2}{\mu_1}=(\dfrac{8}{220})^2

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So, the ratio of  linear mass density μ of the string with the higher pitch to that of the string with the lower pitch is 0.00132. Hence, this is the required solution.

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3 years ago
5. What is the velocity of a 0.5 kg ball that has a momentum of 3.00 kg m/s?
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Answer:

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2 years ago
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What happens to the direction of an object as an unbalanced force acts on<br> it? Give an example
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Answer:

When an unbalanced force acts on a body the side with the greater force's dircetion makes the object move along its direction

Also to find the net force acting on the bofldy you can subtract the two force acting on the body

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3 years ago
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