Amplify your strength with a pulley system! #shorts #pulley #mechanical

Mechanical advantage tells us how much an input force is amplified by a tool, device, or machine. A single pulley attached to a ceiling with a rope running over it and attached to a load has a mechanical advantage of one. This means there is no amplification of the input force. If we want to lift a 100 lb weight, we would need to pull on the rope with at least 100 lb of force to cause the weight to move at a constant velocity, as governed by Newton's Second Law. To get the load to move up 1 meter, we must pull 1 meter of rope. If we add a single movable pulley to the system that is attached to the load, we can amplify the input force. In this example, the rope would go over the pulley at the ceiling as before, but then it would go around another pulley attached to the weight so that it can move with the weight. The end of the rope is then attached to the ceiling. There are now two sections of rope supporting the weight of the load. The free end of the rope is pulled by the person lifting the load. Assuming the load moves at a constant velocity, the net force on the load must be zero. This means the two tension forces in the rope pulling upward on the load together are equal to its weight. Therefore, a 100 lb weight has two rope segments pulling upward, each with 50 lb of force. The person pulling on the free end of the rope therefore only needs to pull with 50 lb of force to cause the 100 lb load to move. If we divide the load by the input force (100 lb ÷ 50 lb), we get a mechanical advantage of 2. Our input force is amplified by a factor of 2. The tradeoff is that the load now moves more slowly. For every 1 meter of rope we pull, the load moves only 0.5 meters, or half as far as before. 👍 LIKE and SUBSCRIBE for more fun science content! ➡️ Follow our channels at https://linktr.ee/tamuphysastr #physics #science #fyp #tamu #DrDawson