What is the momentum of a 100-kg football player running north at a speed of 4m/s

Momentum, p = 400 kg-m/s

Explanation:

Given that,

Mass of the football player, m = 100 kg

Velocity of the player, v = 4 m/s (towards north)

Let p is the momentum of the player. It is given by the product of mass and velocity of the object. Mathematically, it is given by :

p = m v

p = 400 kg-m/s

So, the momentum of the player is 400 kg-m/s. Hence, this is the required solution.

that would be because of both gravity and friction. so     c