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Standard X

Physics

Block and Tackle System

A block and t...

Question

A block and tackle system have VR = 5. Rohan exerts a pull of 150 kgf. What is the maximum load he can raise with his pulley system if its efficiency = 75%?

5000 N

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5500 N

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5600 N

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5625 N

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Solution

The correct option is D
5625 N

A block and tackle system of VR = 5 is as shown below.

Given: VR = 5, L = ?
E = 150 kgf
= 150 $\times$ 10 = 1500 N
$η = \frac{75}{100} = \frac{3}{4} = \frac{M A}{V R}$
$\Rightarrow M A = \frac{15}{4} = \frac{L}{E}$
or L = 5625 N

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A block and tackle system have VR = 5. Rohan exerts a pull of 150 kgf. What is the maximum load he can raise with his pulley system if its efficiency = 75%?

The correct option is D 5625 N A block and tackle system of VR = 5 is as shown below. Given: VR = 5, L = ? E = 150 kgf = 150 × 10 = 1500 N η=75100=34=MAVR ⇒MA=154=LE or L = 5625 N

The correct option is D
5625 N

A block and tackle system of VR = 5 is as shown below.

Given: VR = 5, L = ?
E = 150 kgf
= 150 $\times$ 10 = 1500 N
$η = \frac{75}{100} = \frac{3}{4} = \frac{M A}{V R}$
$\Rightarrow M A = \frac{15}{4} = \frac{L}{E}$
or L = 5625 N