From the diagram given below- what effort has to be applied at C to just raise the Load L -20 Kg - A and frictionA- 10 kgfB- 15 kgfC- 20 kgfD- 30 kgf

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Byju's Answer

Standard X

Physics

The Movable Pulley

From the diag...

Question

From the diagram given below, what effort has to be applied at C to just raise the Load L = 20 Kg?
(Neglect the weight of pulley A and friction)

10 kgf

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15 kgf

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20 kgf

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30 kgf

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Solution

The correct option is A
10 kgf

(i) Pulley A is a single movable pulley while Pulley B is a single fixed pulley.
(ii) Pulley B helps to change the direction of applied effort in a convenient direction.
(iii) Load, L = 20 Kg
Mechanical Advantage of the combination of pulleys, MA = 2
Also, $M A = \frac{L o a d}{E f f o r t}$
Effort $= \frac{L}{M A} = \frac{20}{2} = 10 k g f$
The effort to be applied at C = 10 kgf

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From the diagram given below, what effort has to be applied at C to just raise the Load L = 20 Kg? (Neglect the weight of pulley A and friction)

From the diagram given below, what effort has to be applied at C to just raise the Load L = 20 Kg?
(Neglect the weight of pulley A and friction)