State the equation linking momentum, mass and velocity.
A rugby player of mass 105 kg105\text{ kg}105 kg is running with a velocity of 7.2 m/s7.2\text{ m/s}7.2 m/s.
A second player of mass 70 kg70\text{ kg}70 kg has the same momentum as the first player.
Calculate the velocity of the second player.
