When a particle is projected from the surface of earth its mechanical energy and angular momentum about center of earth at all time are constant.
Q. A particle of mass `m` is projected from the surface of earth with velocity `v_(0)` at angle `theta` with horizontal suppose `h` be the maximum height of particle from surface of earth and v its speed at that point then v is `v_(0)costheta`
A. `v_(0) cos theta`
B. `gt v_(0) cos theta`
C. `lt v_(0) cos theta`
D. zero
