Question

It is easier to roll a stone up a sloping road than to lift it vertical upwards because.

Answer 1

Answer:

Because the force one needs to apply is reduced.

Explanation:

• Work can be expressed in terms of force and distance as follows,

                        Work = Force × distance

• To be more precise, the selection of these two parameters should be in a manner that the distance is what the line of action of the force traces.
• It is obvious that for a given amount of work when one parameter is changed the other changes to counteract the change of the first one.
• Imagine the situation shown in the attached figure. The amount of work that needs to be done during the lifting of the mass to a height of $\small h$ vertically is $E = mg\times h = mgh$.
• On the slope, however, one needs to push the object an $L$ distance up to get the object to that $h$ height ultimately.
• The work he does on the slope is $mgh = F\times L$ and since$L > h$ , $F < mg$.
• The force that needs to be applied is less than that applied in the vertical lift. Hence it feels easier.             #SPJ4