In this question we have given
velocity= 20m/s
mass=70kg
we know that,
Momentum of an object is defined as product of mass of object and velocity with which object is moving.
mathematically,
momentum= mass*velocity...........(1)
Put values of mass and velocity in equation1
![momentum= 20*70](https://img.qammunity.org/2020/formulas/physics/middle-school/626qg6gzfinaxbb8vkb7yhuv0udsf05nwg.png)
momentum= 1400 m*kg/s