The diagram above illustrates a block ans tackle pulley s...
The diagram above illustrates a block ans tackle pulley system in which an effort E supports a load of 100.0N. If the efficiency of the machine is 75%, calculate the value of E
22.2N
38.0N
67.0N
75.0N
Correct answer is A
Given; VR = 6, e = 75%, MA = ?
e = \(\frac{\text{MA}}{\text{VR}} \times \frac{100}{1}\)
MA =\(\frac{75 \times 6}{10}\)
MA = \(\frac{9}{2}\)
MA = \(\frac{L}{E} = \frac{100}{E}\)
\(\frac{9}{2} = \frac{100}{E}\)
9E = 100
E = \(\frac{200}{9}\)
= 22.2N
Similar Questions
Neutrons are used to induce artificial radioactivity because they ...
Which of the following statements about static friction is correct? It ...
Fleming's right hand rule is also called the ...
Which of the following has no effect on radiation? ...
The maximum and minimum thermometer reads the ...
The velocities of light in air and glass are 3.0 x10\(^8\)ms\(^{-1}\) and 1.8 \(\times \)10\(^8...