Aidan drives to school and back each day. The school is 16 miles from his home. He averages 40 miles per hour on his way to school. If his total trip takes 1 hour, at approximately what average speed does Aidan drive home?
Answer (2)
There is normally friction across the pulley. If a weight is suspended by a rope, and the rope goes across a pulley, the pulley exerts friction on the rope if there is any movement, giving rise to inaccuracies in calculations.
A movable pulley reduces the force needed to lift an object by providing a mechanical advantage based on the number of rope sections supporting the load. When friction is minimized, the force you need to apply can be significantly less than the load itself. Understanding this principle allows for effective use of pulleys in various applications.
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