In case of negative work the angle between the force and displacement is
In case of negative work the angle between the force and displacement is
- 0°
- 45°
- 90°
- 180°
Answer
Work done, W = F.d cos θ
Work done at θ = 0°
W = F.d cos 0° = F.d
For angle θ = 0°, the work done is positive, so it is not true.
For angle θ = 45°, W = F.d/√2
In this case also, work done is positive, so it is not true.
Work done at θ = 90°, W = 0
So, it is not true.
Now, work done at θ = 180°, W = -F.d
For negative work, the angle between the force and displacement should be 180°.
The correct option is D.