Question:
Which simple machine is used in a variety of ways to lift loads, apply forces, and to transmit power?
Answer:
B. Pulley
Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power, but the simplest of pulleys serves only to reverse the direction of the effort force. It consists of a single pulley attached directly to a non-moving surface with a rope or cable through it.
hope it helps!
