Question

A body is projected at an angle $\alpha$ from a point O. Its angular momentum will be zero at:

• A. the point where it touches ground
• B. another point on trajectory
• C. starting point
• D. at the maximum height

Answer 1

Answer: (C)

starting point

Answer 2

The relation for angular momentum is $={{r}_{p}}\sin \alpha .$ The required conditions for angular momentum to be zero, is only $r$ to be zero because momentum p can never be zero and also projected angle a can never be zero while the body is in projectile path.