General Knowledge - Physics - Discussion

May be because of force. Because on rolling as compared to lifting the required amount of force is less.

Work in vertical lifting = m*g*H.

Work on sloping rode = F*L = m*g*sin(slope)*L = m*g*H.

So work is the same, but the force, F, is less = m*g*sin(slope).

C is the correct answer. Work done is the same but the rate at which the work done is less in the slope.

We all know that work done in lifting a stone vertically upward or rising a heavy object is never less than or equal to when pulled or pushed using a ramp or inclined plane why? Because when lifting it upward work is done against gravity while when using ramp.

Some of the force applied to push the stone overcome friction while the other force remaining is used to overcome the load but in the absence of friction the work done in raising the stone is equal to the work done using the inclined plane to pull the stone. Thanks for reading.

I think that if we lift this stone, we must effort a lot but if we roll it, we must effort a little. And so the work done is directly proportional to the effort.

Definitely the correct option is D, if we thrown the stone vertically we lost more effort and the stone is directly return to the original position due to the gravity but when you thrown the stone incline there is no gravity and friction. So the work done in lifting is less than in rolling.

In case rollin their force component get resolved but in in case of lifting single force component act over body so according to work formula as we know that:

W = fdcoso.

Force component not resolved that's why value of cos increased. So over all work increased. against gravity f-is force d-is displacement.

Work done in rolling is less than lifting it up because the work done is force per distance of an object.
Here the force becomes directly proportional to the distance while in lifting the force becomes inversely proportional to distance because of potential energy possessed.

I think work done in both cases are the same, if and only if the inclined surface is frictionless because the conservative force does not depend on the path of the object.

Much effort is been applied when lifting, less work is done when rolling.