pulley

खाँचो भएको पाङ्ग्राको सरल यन्त्र, जसमा चल्ने डोरीमा लगाइएको बलको दिशा वा लगाउने बिन्दु बदलिन्छ

a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope