ICSE Class 10 Answered
For a single string Pulley system a man has an upper block of 5 pulley and choice for the lower block of either 4 Pulleys of mass 20kg or 5 pulley of mass 30 kg state giving reasons and showing calculation which block you would recommend if the system is to lift a mass of 50 kg
Asked by Samrat | 30 Jun, 2018, 11:31: PM
Expert Answer
Case (1) :- 5 pulleys of upper block and lower block of 4 pulleys of mass 20 kg
Efficiency
Case (2) :- 5 pulleys of upper block and lower block of 5 pulleys of mass 30 kg
Efficiency
5 pulleys of upper block and 4 pulleys of mass 20 kg gives more efficiency.
In general lower block pulleys weight should be less to get more efficiency
Answered by Thiyagarajan K | 04 Jul, 2018, 03:53: PM
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