Question

a ball o mass 1kg is projected vy velocity 20root2 from the origin of xy coordinate at an angle 45 find angular momentum

Answer 1

The horizontal component of velocity remain constant.

Therefore, the change in momentum is not caused by the horizontal component but the vertical component of its velocity.

Thus, only taking the vertical component we get:

initial velocity = vsin30° (upwards),

final velocity = vsin30° (downwards) which is -vsin30° (upward).

Thus, change in momentum = m (vsin30° - (vsin30°)) = m2vsin30° = mv (downwards) as sin30° = 1 / 2

Answer 2

Answer:

-400 k

Explanation: negative is for downwaed direction

use R= ucostheta*t

then L = mvR