A man pushes a wall and fails to displace it. He does
A man pushes a wall and fails to displace it. He does
The correct option is C No work at all
Explanation for the correct option:
Option (C): No work at all
Work = Force x Displacement
As man fails to displace the wall, displacement of the wall is zero. [Applied force is not zero]
So, the work done will be zero.
Explanation of the incorrect options:
Option (A): Negative work
When the direction of applied force and displacement are in opposite direction.
Example- work done against gravity, frictional work etc.
Option (B): Positive but not maximum work
When the direction of applied force and displacement are in the same direction.
Example- pushing chair, kicking football etc.
Option (D): Maximum work
Direction of applied force and displacement are in same direction and angle between them is zero.
Hence, Option (C) is correct.
No work at all
Explanation for the correct option:
Option (C): No work at all
Work = Force x Displacement
As man fails to displace the wall, displacement of the wall is zero. [Applied force is not zero]
So, the work done will be zero.
Explanation of the incorrect options:
Option (A): Negative work
When the direction of applied force and displacement are in opposite direction.
Example- work done against gravity, frictional work etc.
Option (B): Positive but not maximum work
When the direction of applied force and displacement are in the same direction.
Example- pushing chair, kicking football etc.
Option (D): Maximum work
Direction of applied force and displacement are in same direction and angle between them is zero.
Hence, Option (C) is correct.
