If a 2-kg ball is thrown through the air at 20 m/s what is he momentum of the ball?
Answer: P =40 kgm/s
Explanation: If we ignore the effects of gravity and air resistance, we can think that the ball is moving at 20m/s constantly.
We know that the moment of some object can be calculated as:
P = mv
where P is the moment, m is mass and v is the velocity of the object.
Then, in this case, we have:
P = 2kg20m/s = 40 kgm/s
This is the momentum of the ball.