Akash can move an iron block at rest ,placed on a metal sheet by pushing it with a force of 50 N. Whena lubricant is applied on the effort is reduced to do the same activity .The force with which the block can be moved in the second case is "________".

Akash can move an iron block at rest ,placed on a metal sheet by pushi

1.	Akash can move an iron block at rest ,placed on a metal sheet by pushing it with a force of 50 N. Whena lubricant is applied on the effort is reduced to do the same activity .The force with which the block can be moved in the second case is "________".
Answer» 25 N 37.5N 12.5 N 50 N Solution :Intial FORCE applied to move the block F= 50 N When the lubricant is applied ,ONE fourth of the effort is reduced . Therefore , the force applied to move the block is `F=F-F/4= 50 - 50/4` =50- 12.5= 37.5 N HENCE , the correct option is (B)