The efficiency of the pulley system shown above is 80%. f...
The efficiency of the pulley system shown above is 80%. find the effort E required to lift the load of 1200N
275N
325N
375N
573N
Correct answer is C
VR = No. of pulleys = 4
Efficiency = \(\frac{M.A}{V.R}\)
cross multiply
\(\frac{80}{10} * V.R\) = M.A
\(\frac{80}{10} * 4\) = M.A
M.A = 3.25
where M.A = \(\frac{load}{effort}\)
∴ Effort = \(\frac{1200}{3.2} * V.R\)
= 375N
Similar Questions
Determine the value of x from the nuclear reaction below, \(^{222}_{86}Rn\) → \(^{x}_{88}Ra\...
According to kinetic molecular model in gases, ...
When salt is dissolved in water, the freezing point of the water ...
Which of the following statements defines correctly the efficiency of a machine? ...
The velocity ratio of an inclined plane where angle of inclination in θ is ...
The material used for constructing the core of an electromagnet is ...