Akash can move an iron block at rest ,placed on a metal sheet by pushing it with a force of 50 N. When a 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 `"________"`.
A
25 N
B
`37.5` N
C
`12.5` N
D
50 N
Text Solution
Verified by Experts
The correct Answer is:
B
Initial force applied to move the block, `F=50N` 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=37.5N` Hence, the correct option is (b).
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