Question

How can we increase the efficiency of the pulley system?

Answer 1

A pulley system makes lifting an object easier than lifting a dead weight by hand. A single pulley effectively alters the direction of the applied pull or force. A pulley system consists of a wheel with a groove designed to support movement on an axle or shaft, as well as a rope in the groove.

Complete answer:
When the surface of one item comes into touch with the surface of another, friction is the force that opposes motion. Here in this pulley system there comes this contact force between pulley and chain and results in the need for a large force. To reduce this frictional force, we can use lubricants. A lubricant is a material that can lower the friction between the surfaces that are in contact, lowering the amount of heat created when the surfaces move. In this manner, we can increase the efficiency of a pulley system. Also by reducing the mass of the pulley we can increase its efficiency.

Additional Information:
There are three different kinds of pulleys. The kind of pulley system is determined by how the wheel and rope are connected and they are fixed, moveable, and compound. In a fixed pulley system, the place of the pulley is fixed and the wheel of the pulley moves in the direction of the rope. A moveable pulley is attached to a movable block via an axle. Since a single moveable pulley is supported by two sections of similar rope it has a mechanical advantage of two. Whereas compound pulley is a blend of fixed and portable pulleys structures a square and tackle. A square and tackle can have some pulleys mounted on the fixed and moving axles, further expanding the mechanical benefit.

Note:
A pulley does not run on its own and does not need fuel or energy, yet it is still a machine. A single pulley allows you to move the weight with half the force necessary, but a system of pulleys doubles the mechanical advantage by multiplying the number of pulleys and the lengths of rope supporting the load. Mechanical advantage, which is described by the ratio of output force to input force. The mechanical advantage is larger when the input force is smaller than the output force.