General Knowledge - Physics - Discussion

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.

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

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).

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

It is wrong.

Work done in both the cases is the same.

Because the work done is equal to the gain in potential energy and since they are being raised to the same height, the energy is same so the work in same. In case of rolling only the force required Is small but the work done is same.

It may be a controversial issue since the question itself is not well asked in the first place. It all depends whether the two balls travel with the same displacement or not. Considering that they travel with the same displacement, more work is required to lift the ball vertically than to roll it along a slope.

Answer C is correct.

In this context of rate of energy (power not work!) is greater and gravitational potential energy change (work) is the SAME.

To consider D is to revert to the thinking of Aristotle. Rather than Galileo and Newton.

Work done in lifting is greater than that of rolling.

D is 100 % correct answer.

Lifting a stone is against gravity while roling is supported by gravity.