A block and tackle pulley system is used to lift a load having four number of pulleys. It lifts a load 450 kg through a vertical height of 20 m. The effort applied is 250 kg.
Can anyone plz explain this numerical
Answers
Answered by
2
Explanation:
Number of pulleys = 5
Load = 50 kgf= 50x10=500 N (g=10 m/s2)
work=load x hieght = 500 x20 = 10000 J
Energy lost to overcome friction = input work - output work
2000= input work - 10000
input work= 12000 J
Similar questions