Work Energy And Power Question 231
Question: A man starts walking from a point on the surface of earth (assumed smooth) and reaches diagonally opposite point. What is the work done by him?
Options:
A) Zero
B) Positive
C) Positive
D) Nothing can be concluded
Show Answer
Answer:
Correct Answer: A
Solution:
As the surface is smooth, the work done against friction is zero. Also, the displacement and force of gravity are perpendicular, so the work done against gravity is zero.
BETA
