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In Case Of Ice Skating, Replacing Ice Surface With Grass Wil...
In case of ice skating, replacing ice surface with grass will make no difference.
Options:
A .  True
B .  False
C .  Both will have to apply the same amount of force.
D .  Both of them don't need to apply any force to move the box.
Answer: Option B
:
B
As the surface of ice is very smooth, frictional force is negligibly small, which helps the skaters move around easily.
However, if the ice surface is replaced with grass, friction would increase significantly because of which skating wouldn't bepossible.

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