Interactive Science exhibits, ideated and fabricated to inclucate and invigorate the young minds about Science !!
Pulley and pulley block
Lift the three equal weights one by one.
What did you observe?
Though the weights are equal, the energy spent on each varies.
The science behind it :
The energy spent varies according to the number of pulleys connected to the weight. Here the pulleys are acting as levers. As the number of pulleys increase, the mechanical efficiency also increases.