PIRA Classification: 1M20.11
Description: A 30 N weight is lifted with and without pulleys to show the mechanical advantage of pulleys. First, the weight is lifted with a spring scale. The reading is noted. The weight and scale are then connected by a rope, which is over a pulley. The reading is again noted. The weight is then hung from the pulley. The pulley-weight system is then raised using the scale. The small pulley weighs 7 N.
Special Instructions: None
Condition: OK
Setup time: 3 minutes
Safety Issues: None