The radius of a wheel is 30.0 cm and that of its axle is ...
The radius of a wheel is 30.0 cm and that of its axle is 6.0cm. Calculate the effort required to lift a load of 120.0N using this machine. Assuming 100% efficiency
600.0N
40.0N
24.0N
20.0N
Correct answer is C
V.R = \(\frac{R}{r} = \frac{30}{6} = 5\)
\(\gamma = \frac{M.A}{V.R} \times \frac{100}{1} \)
M.A = \(\frac{100 \times 5}{100} = 5\)
Effort = \(\frac{L}{M.A} = \frac{120}{5}\)
= 24N
In the electrical method of making a magnet, the polar the magnet formed depends on the ...
Which of the following statements about wave motion is correct? ...
Which of the following statements is true of nuclear fission? ...
Which of the following is a type of incandescent light source? ...
If the system above is in equilibrium, the tension in the string Q is ...