General Knowledge - Physics - Discussion
Discussion Forum : Physics - Section 1 (Q.No. 2)
2.
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
Discussion:
84 comments Page 5 of 9.
Hassan tukur said:
1 decade ago
On my way becouse in the throwing the stone gravitational force oppose the motion but in rolling it on the ground there is no gravitational force opposing the motion.
ASHISH CHUDHARY IITIAN said:
1 decade ago
When we lift the block,we have to work against the gravitational force Mg but to roll the block up on the inclined plane it requires less work as Mg gets resolved.
Htay Naing Oo said:
10 years ago
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.
Zain said:
9 years ago
The work doesn't change in both cases, it's true the gravitational force will less in the second case but the distance will be greater so that the work is same.
NEB said:
1 decade ago
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).
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).
DEBBRATA GHOSH said:
1 decade ago
I Know that When a Stone rolling, in that time friction Worked but its quantity not more than gravitational force. That caused option D is right.
Brighty said:
1 decade ago
If we roll any object from slope or from any were the rolling of the body is less compared to lifting the object so the this the correct answer.
Zoha nasir said:
1 decade ago
Since, the coefficient of rolling friction is less than the coefficient of sliding friction, the work done in rolling becomes less than lifting.
(1)
Victor ify said:
1 decade ago
Always remember that gravitational pull always tries to pull an object going upward downward so more work is done in lifting dan in rolling.
Yondu said:
5 years ago
According to me, C is the correct answer. Because no more or less work is done if the displacement is the same in both the case.
(1)
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