Physicseasy · Past Paper
Work done is zero when the angle between force and displacement is:
A0 degree
B45 degree
C90 degree
D180 degree
✓ Correct Answer: C — 90 degree
Work done is W = Fs cos(theta). When theta is 90 degrees, cos(90) = 0, so work done is zero.
Share this question
More from Physics
- A body is moving with constant acceleration. If it travels 10m in 2s and 30m in next 2s, what is the initial velocity?
- A ship moves from river water to sea water. It will:
- If the distance of an object from a convex lens is increased, what happens to the size of the real image?
- A simple microscope has a lens of focal length 5 cm. Its magnifying power for relaxed eye (image at infinity) is:
- The image of an object is formed on which part of the human eye?