Two balls are dropped (with zero initial speed) from a height h. show answer No Attempt If ball A has twice the mass of ball B, what can be said about the momentum of each just before they hit the ground? Ignore air resistance.
Two balls are dropped (with zero initial speed) from a height h. show answer No Attempt If ball A has twice the mass of ball B, what can be said about the momentum of each just before they hit the ground? Ignore air resistance.
Answer:
Explanation:
Let the mass of ball B is m so that the mass of ball A is 2m.
initial velocity of both the balls = 0
Let both the balls falls from the height h.
Use third equation of motion,
v² = u² + 2gh
so, the velocity with which the balls hit the ground is
[tex]v=\sqrt{2gh}[/tex]
So, both the balls hit the ground with the same speed.
momentum, p = mass x velocity
As the velocity is same but the mass of ball A is 2 times the mass of ball B, so the momentum of ball A is twice the momentum of ball A.