Pulley

What is a pulley and where are they used?

The diagram shows a fixed pulley used by a boy to lift a load of $500 \mathrm{N}$ through a vertical height. The effort applied by the boy on the other end of the rope is $630 \mathrm{N}$. Calculate the efficiency of the pulley.

What are the advantages of a fixed and movable pulley system? Explain with a diagram.

What are the uses of combination of pulley?

Explain the relation of the weight of the pulley with the mechanical advantage.

The weight of the pulley does not have any effect on the efficiency of a machine.

Is there any relationship between mechanical advantage velocity ratio and efficiency of a machine? Explain.

Why is the mechanical advantage of a single fixed pulley equal to one?

In a single fixed pulley, the wheel is stationary and motionless.

Explain about single fixed pulley.

For a movable pulley, $MA=2, \eta =100\%$, and what will be its $VR$?

For a movable pulley, $MA=2$, $VR=2$ and what will be its $\eta$?.

The arrangement of number of fixed and movable pulleys in a system is called :

(Choose from: Block and tackle pulley system/ Block pulley system/ Fixed pulley system)

The mechanical advantage in the ideal case of a single moveable pulley is greater than one.

What are uses of single moveable pulley?

The efficiency of a single moveable pulley system is not $100\%$. Why?

List the different types of pulleys.

Name the machine used to change the direction of force.

What is pulley?

Why in block and tackle pulley system, the mechanical advantage increases with the increase in the number of pulleys?