The given figure shows a wheel and
axle being used to lift a load.
Which of the following changes will
reduce the effort required?
A Increasing the radius of the wheel
B Decreasing the radius of the axle
C Both (A) and (B)
D Neither (A) nor (B); the effort depends
only on the weight of the load
how the hell can c can be the ans it is saying that to both increase and decrease the radius of wheel