The speed of a 4-kg ball with a momentum of 12 kg m/s is

3 m/s

Explanation:

The momentum of an obejct is given by

where

m is the mass of the object

v is the velocity of the object

For the ball in this problem, we know:

is the momentum

is the mass

Therefore, we can re-arrange the equation to find v, the velocity of the ball:

the answer to this question is 60 n

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..