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Akash can 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 NB. 37.5NC. 12.5 ND. 50 N |
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Answer» Correct Answer - B 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) |
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