How does the momentum of a 75 kilogram stationary football player compare with that of a 70 kilogram player moving at a velocity of 6 meters/second?
Momentum of an object = (its mass) x (its speed) .
Since speed is a factor of momentum, an object that
isn't moving doesn't have any.
-- The moving player has momentum.
-- The stationary one doesn't.
Momentum = Mass velocity
For the stationary football player, his velocity = 0
Momentum = 75 kg 0 = 0 kgm/s
The second player = 70kg * 6 m/s = 420 kgm/s
The first player has no momentum, the second player has a momentum of 420 kgm/s