Question

why if is easier to push a lighter box than a aimilar heavy box on the same floor

Answer 1

HELLO THERE!

From practical experiment, we see that it is easier to push a lighter box than a similar heavy box on the same floor.

If μ is the Coefficient of friction,

then frictional force given by the floor to oppose the motion of the block = μR, where R is the Normal Reaction force acting on the body.

R = mg (weight of the body).

So, heavier is the body, more is its mass. Hence, More is its Normal Reaction Force, due to which the frictional force will be more (as μ is same for the block and the surface).

So, this is the reason why it is too difficult to push a heavier box on a floor.

THANKS!