Question

If the value of g suddenly becomes twice its value, it will become two times more difficult to pull a heavy object along the floor. Why? Answer the question

Answer 1

Very good question . Thanks for asking it .

If value of g suddenly becomes twice its value, it will become two times more difficult to pull a heavy object along the floor because :

We know that Weight =W mxg
as g becomes 2g
W=mx2g
W=2 mg
Weight of the body becomes double. 
So when we are pulling the heavy object on the floor , initially it possess static friction . As weight is increasing , normal force acting on the object also increases.
Since Normal Force α Frictional force.

As Normal force increases, when we try to pull the object by applying force , frictional force will be more . As frictional force is self adjusting force and once its overcomes, the object tries to move easily as Static friction is greater than sliding friction 

Answer 2

Answer:

Explanation:

(i) If the value of g becomes double,the force with

which the earth pulls the object i.e weight of

object becomes double.

(ii) As weightincreases,frictional force also increases

while pulling the object

( iii) Hence, it will become two times more difficult to

pull a heavy object along the floor.