Physicsmedium · Past Paper
A body of mass 10 kg is moving on a horizontal frictionless surface with velocity 5 m/s. Work done by gravity is:
A50 J
B250 J
C0 J
D500 J
✓ Correct Answer: C — 0 J
Gravity acts vertically downward while displacement is horizontal (90 degrees), so work done by gravity is zero.
Share this question
More from Physics
- An object of mass 5 kg is raised through a height of 10 m. What is the work done? (take g=9.8 m/s^2)
- If the distance of an object from a convex lens is increased, what happens to the size of the real image?
- A boy throws a ball of mass 200g vertically upwards. It reaches a height of 5m and comes back. Total work done by the boy is:
- If a body covers 20m in 2nd second and 30m in 3rd second of its motion, what is its acceleration?
- A point source of light is placed at the focus of a convex lens. The emerging rays will be: