General Knowledge - Physics - Discussion

Same amount of work, just over a greater distance. It's gotta be C.

The answer is definitly option D.

Actually we know that perpendicular is the smallest distance,

So the normal force at a shorter distance will be more effective in lifting than a vector's of normal force in rolling.

I think the work done in both cases is the same. Because the potential energy is the same in both cases, because we deal with gravity and gravity is a conservative force.

Stephen is not right bcoz work = force*displacement(not distance).So,option D is right.

D is the right answer that is true.

Here we have to consider the concept of inclined plane no doubt the amount of work done is same either we do it by rolling or pulling but one of the benefit is that gravitation force will be neglected.

More the slope less will be the effort.

Work done in lifting is not more or less we feel it more due to the gravitational force acting on that object in same way we have to push it so no force required against gravity.

Whether you lift the stone or roll it up the slope ,stone gains potential energy equal to mgh .The stone gained this energy and by same amount you lost it ! Frictional force at the time of rolling up makes you to loose a little more of energy. You would have lost energy mgh when you lift it and mgh+ when you roll it up . Is it not better to lift then to roll it? Catch is here. There is mechanical advantage when you roll. Lever principle can be applied . Let the slope be 1/10. Rolling distance is 10 units whereas the lifting distance remains 1 unit . The effort is 1/10 now. You have a convenient comfort level ! In an ideal condition work done is same in both the cases. Rate of energy spending is less because you travel more distance. You spent less effort 1/10 and travelled 10 times more distance. Answer C is correct.

It is easy to roll down because the work is done when we throw it in vertical direction.