39. Work energy theorem is valid in

30. Select the correct statement. Work is done by the internal forces on the system

12. 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?

The velocity time graph of a motion starting from rest with uniform acceleration is a straight line:

A projectile is thrown at an angle of 45∘ with horizontal and its range is R2. Another projectile is thrown at an angle of 45∘ with vertical and its range is R2. The relation between R1 and R2

9. contraction can be sustained for a long period of time by

the maximum velocity required of an object to go out from the gravitational field in heavenly body is

When ball having a projectile motion is rising up, it

30. ascaris lumbricoides is present in _______ of man

27. the alimentary canal in nematodes is