What variables go into preventing injury ?

Here below are some basic measures to take in order to avoid a sports injury: Make a training routine that contains exercise, strength training, and flexibility exercises. This will help to lower your risk of injury. Exercising different muscle groups every other day is a good idea.

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.