Give 3 visible examples of motion that is caused by forces from living things

1) A mother pushing his son in the swings on the park, here the mother is applying the mechanical force which creates a movement on the kid.

2) Is a kid jumps on the ground, he is applying mechanical force in the ground which permits him elevate a little bit and "fight" against the gravity force.

3) Walking, when you walk, the bottom of your feet is using the friction force in the ground to impulse your body.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.