Which of the following differences between a single fixed pulley and a single movable pulley is incorrect?
Single fixed pulley Single movable pulley
(1) It is fixed to a rigid support (i) It is not fixed to a rigid support.
(2) The load moves in a direction opposite to the effort. (ii) The load moves in the direction of effort.
(3) Its ideal mechanical advantage is 1. (iii) Its ideal mechanical advantage is 1.
(4) Its ideal velocity ratio is 2. (iv) Its ideal velocity ratio is 1.
(5) The axis of rotation does not move in space. (v) The axis of rotation also moves.
(5)
(2) and (5)
(3) and (5)
(3) and (4)
Machines
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Question

Which of the following differences between a single fixed pulley and a single movable pulley is incorrect?
Single fixed pulley Single movable pulley
(1) It is fixed to a rigid support (i) It is not fixed to a rigid support.
(2) The load moves in a direction opposite to the effort. (ii) The load moves in the direction of effort.
(3) Its ideal mechanical advantage is 1. (iii) Its ideal mechanical advantage is 1.
(4) Its ideal velocity ratio is 2. (iv) Its ideal velocity ratio is 1.
(5) The axis of rotation does not move in space. (v) The axis of rotation also moves.
(5)
(2) and (5)
(3) and (5)
(3) and (4)

Machines

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KnowledgeBoat · Accepted Answer

(3) and (4) Reason The correct differences are: Single fixed pulley | Single movable pulley ------------------|------------ (1) It is fixed to a rigid support |(i) It is not fixed to a rigid support. (2) The load moves in a direction opposite to the effort. | The load moves in the direction of effort. (3) Its ideal mechanical advantage is 1. | (iii) Its ideal mechanical advantage is 2. (4) Its ideal velocity ratio is 1. | (iv) Its ideal velocity ratio is 2. (5) The axis of rotation does not move in space. | (v) The axis of rotation also moves.

Physics

Machines

Answer

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The relationship between mechanical advantage (M.A.) and velocity ratio (V.R.) for a practical machine is:
M.A.= V.R.
M.A.> V.R.
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Single fixed pulley	Single movable pulley
(1) It is fixed to a rigid support	(i) It is not fixed to a rigid support.
(2) The load moves in a direction opposite to the effort.	(ii) The load moves in the direction of effort.
(3) Its ideal mechanical advantage is 1.	(iii) Its ideal mechanical advantage is 1.
(4) Its ideal velocity ratio is 2.	(iv) Its ideal velocity ratio is 1.
(5) The axis of rotation does not move in space.	(v) The axis of rotation also moves.

Physics

Machines

Answer

Related Questions

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2ⁿ
2ⁿ⁺¹
2^n-1
2ⁿ⁺²

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none of these