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?
a)
Zero
b)
Positive
c)
Negative
d)
Nothing can be said
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?
a)
Zero
b)
Positive
c)
Negative
d)
Nothing can be said
Question ID - 54592 | SaraNextGen Top Answer
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?
a)
Zero
b)
Positive
c)
Negative
d)
Nothing can be said
|
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? |
|||||||
|
a) |
Zero |
b) |
Positive |
c) |
Negative |
d) |
Nothing can be said |
1 Answer
127 votes
Answer Key / Explanation : (a) -
|
(a) The earth behaves for all external points as if its mass
Will remain same. Hence, no work is done by the man against gravity. |
were concentrated at its centre. When man of mass
walks from a point on earth’s surface and reaches diagonally opposite point, then gravitational potential energy given by
127 votes
Answer Link
127