Multiple choice general knowledge

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

  1. work done in rolling is more than in lifting

  2. work done in lifting the stone is much more than rolling it

  3. work done in both is same but the rate of doing work is less in rolling

  4. work done in rolling a stone is less than in lifting it
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rolling a stone up a slope requires less work than lifting it vertically because the force needed is much smaller when spread over a longer distance (mechanical advantage). When lifting vertically, you must overcome the full weight directly. Rolling spreads the work over more distance with less force. The other options incorrectly claim rolling requires more work or the same work.

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