Question

if value of g suddenly become twice its value it will become two times more difficult to pull heavy object along the floor . why

Answer 1

We Know That F=ma By Newton's 2nd Law Of Motion. Where F is Force Applied m is mass and a is acceleration of the object.Now if value of g becomes twice, In RHS a becomes twice i.e. 2x9.8 equals 19.6m/s2So Friction Becomes Twice As Normal Force On Earth Is TwiceNow Mass Is Constant in all of the universe so for 2nd law to hold Force must also increase by a factor of 2, Hence it becomes two times difficult to pull an object.

Answer 2

we know:- F=mg so wheng is doubled
f will be doubled so more force needs to be applied (twice)
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