Check Your Knowledge!
Pulley Systems

		This rope and pulley system supports the 400 lb weight. How much tension in the rope is needed to hold the weight in equilibrium.
		(Check the correct answer.) 100 lb. 80 lb 44.44 lb

		This rope and pulley system supports a 75 lb weight. How much tension in the rope is needed to hold the weight in equilibrium..
		(Check the correct answer.) 37.5 lbs 25 lbs 21 lbs

		How much force does the person need to pull with so that the scale will read 100 lbs.
		(Check the correct answer.) 75 lb 66.7 lb 80 lb