Draw a diagram of combination of three movable pulleys and one fixed pulley to lift up a load. In the diagram, show the directions of load, effort and tension in each strand. Find:
(i) the mechanical advantage,
(ii) velocity ratio and
(iii) the efficiency of the combination in the ideal situation.

Question

Draw a diagram of combination of three movable pulleys and one fixed pulley to lift up a load. In the diagram, show the directions of load, effort and tension in each strand. Find:
(i) the mechanical advantage,
(ii) velocity ratio and
(iii) the efficiency of the combination in the ideal situation.

KnowledgeBoat · Accepted Answer

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Draw a diagram of combination of three movable pulleys and one fixed pulley to lift up a load. In the diagram, show the directions of load, effort and tension in each strand. Machines, Concise Physics Class 10 Solutions.

In equilibrium, Effort E = T₃ (1) Tension T₁ in the string passing over the pulley A is given as 2T₁ = L T₁ = (2) Tension T₂ in the string passing over the pulley B is given as 2T₂ = T₁ T₂= Substituting value of T₁ from equation 2, T₂ = (3) Tension T₃ in the string passing over the pulley C is given as 2T₃ = T₂ T₃ = Substituting value of T₂ from equation 3, T₃ = (4) In equilibrium, T₃ = E From equation 4, Load L = 2³ x T₃ (5) (ii) As we know, one end of each string passing over a movable pulley is fixed, so the other end of string moves up twice the distance moved by the axle of the movable pulley. If the load L attached to the pulley A moves a distance d, then d_L = d Now, the string connected to the axle of pulley B, moves up by a distance, 2 times d = 2d. Then the string connected to the axle of the pulley C, moves up by a distance, 2 times 2d = 2²d Then the end of the string passing over the fixed pulley D, moves up by a distance, 2 times 2²d = 2³d. Hence, d_E = 2³d. As we know, Substituting the values in the formula we get,

Physics

Draw a diagram of combination of three movable pulleys and one fixed pulley to lift up a load. In the diagram, show the directions of load, effort and tension in each strand. Find:
(i) the mechanical advantage,
(ii) velocity ratio and
(iii) the efficiency of the combination in the ideal situation.

Machines

ICSE

Related Questions

Draw a diagram of a block and tackle system of pulleys having a velocity ratio of 5. In your diagram indicate clearly the points of application and the directions of the load L and effort E. Also mark the tension T in each strand.

State four differences between a single fixed pulley and a single movable pulley.

Physics

Draw a diagram of combination of three movable pulleys and one fixed pulley to lift up a load. In the diagram, show the directions of load, effort and tension in each strand. Find:(i) the mechanical advantage,(ii) velocity ratio and(iii) the efficiency of the combination in the ideal situation.

Machines

ICSE

Related Questions

Draw a diagram of a block and tackle system of pulleys having a velocity ratio of 5. In your diagram indicate clearly the points of application and the directions of the load L and effort E. Also mark the tension T in each strand.

State four differences between a single fixed pulley and a single movable pulley.

Draw a diagram of combination of three movable pulleys and one fixed pulley to lift up a load. In the diagram, show the directions of load, effort and tension in each strand. Find:
(i) the mechanical advantage,
(ii) velocity ratio and
(iii) the efficiency of the combination in the ideal situation.