Question

In the following pulley system ,if an effort of 50N is applied , then it can lift a maximum load of ?

Answer 1

Explanation:

The minimum force required would be 50 N 2.

Answer 2

Answer:

Load to be lifted F

load

=50 kgf

Case 1 : Fixed pulley is used.

MA for single fixed pulley MA=1

Thus effort applied by the boy F

effort

=

MA

F

load

=

1

50

=50 Kgf

Case 2 : Movable pulley is used.

MA for movable pulley MA=2

Thus effort applied by the boy F

effort

=

MA

F

load

=

2

50

=25 Kgf

So, effort to be applied by the boy is less in case when he used a movable pulley because MA for a movable pulley is greater than 1.