What shape is a V-belt known for that assists in power transmission?

A V-belt is known for its trapezoidal shape, which plays a crucial role in its ability to transmit power efficiently. The design features two sloped sides that form a "V" shape, allowing the belt to fit snugly into the grooves of pulleys. This design increases the contact area between the belt and the pulley, enhancing grip and reducing slippage, which is especially beneficial when transmitting higher levels of torque.

The trapezoidal shape also helps in self-centering the belt within the pulley grooves during operation, contributing to stability and alignment. This helps maintain consistent power transmission without excessive wear or the risk of the belt falling off during use. Overall, the V-shape provides optimal engagement with the pulleys due to its mechanical advantages derived from geometry, making it the most effective design for power transmission applications.