Question

A boy P goes to the terrace of a hotel by a spiral staircase. Another boy Q of the same mass goes to this terrace by a slanting ladder. Which one of the following statements is correct?

• A. P does more work than Q against gravity.
• B. Q does more work than P against gravity.
• C. Both P and Q do equal amount of work against gravity.
• D. P does not do any work against gravity.

Answer 1

The correct option is C Both P and Q do equal amount of work against gravity.

As, Work done $W=mgh$; since m,g,h is same for both P and Q.
So, both P and Q do equal amount of work against gravity.
Hence, option C is correct.