The diagram represents a block-and-tackle pulley system o...
The diagram represents a block-and-tackle pulley system on which an effort of 50N is just able to lift a load of weight W. If the efficiency of the machine is 40%. find the value of W
300N
200N
140N
120N
20N
Correct answer is D
Eff = MAVR x 100%
40 = MA60
MA = 240
LE=240100
W = L = 240100 x 50
= 120N
Similar Questions
The pinhole camera works on ...
A gas would serve as an electrical conductor under ...
Which of the following statements about pressure is not correct? pressure ...
Which of the following is the dimension of pressure? ...
The energy E of a photon and it's wavelength are related by Eλ = X. the numerical value of X is? ...
In a cathode ray tube, the function of the x-plates is to ...
Opening in the eye through which light passes to the retina is called the? ...