4. Write any three differences between single fixed pulley and single moveable pulley . Thanks to correct answer.
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Write any three differences between single fixed pulley and single moveable pulley.

Single fixed pulley;

Pulley do not go up and down.This pulley has a fixed axis of rotation. The load is attached to one end of the rope. Only the direction of the force is changed, not the magnitude.

Single moved pulley;

Pulley move up and down.The axis of rotation of this pulley is not fixed. The load is attached to the pulley.The direction of the force as well as the magnitude of force change.

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n