ICSE Class 10 Physics 2017 Solved Paper

A pulley system with VR=4 is used to lift a load of 175‌kgf through a vertical height of 15m. The effort required is 50‌kgf in the downward direction. (g=10Nkg−1)
Calculate:

Question : 29

Total: 65

Work done by the effort.

Solution:

Work done be the effort = Effort ×dE
‌ Given : ‌‌ Effort ‌‌=50‌kgf =50×10=500N
∴‌‌WE‌=E×dE=500×60J
‌=30,000J

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