Question

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. The larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. If a bucket of water is 50 N, then how much effort is required to raise it?
12.5 N
200 N
2 N
500 N

Answer 1

Answer:

The effort is required to raise bucket of water from the bottom of a well is 200N

Explanation :

Radius of the larger wheel = 40cm

Radius of the axle = 10cm

Mass of the bucket of water= 50N

Now,

According to the gravitational formula

          Force  = mgR

Due to constant acceleration g has no value  

M is the mass of the bucket of water

R is the radius of the larger wheel/radius of the axle

= $\frac{40cm}{10cm}$

=4cm

Substituting the values in mgR

= 50$\times$4

=200N

Hence, 200N of force is required to raise it.