Question

IF an effort of 400 newton is applied to pull a load of 320 Newton vertically up to 5 metre in 5 second, find V.R, M.A and efficiency of the machine.​

Answer 1

Answer:

❤️solution❤️

Load to be lifted = 400 N

Lord of moveable part = 5m × 5sec

=25 m/ sec

Mechanical advantage = No. of pulleys

Mechanical advantage = 400 ÷ 25

= 16

Hence , No. of pulleys = 16

Actual mechanical advantage = N-W/E

Where, w is load due to pulleys system effort

actual mechanical advantage = 16 - 320 ÷ 25

effiency. = 1 - W/ NE = 1 - 320 ÷ 6×25

= 1333.33 is the answer........✨

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