### The Art Of The Tackle

In the image above, Navy quarterback Kaipo Enhada is tackled by Massachusetts defensive lineman James Ihedigbo and linebacker Charles Walker.

#### News You Can Use

- The main objective of a tackle is to stop a competitor?s forward momentum. Momentum is defined as mass multiplied by velocity. If a competitor has more mass than you, you need to tackle him head on with a greater velocity to tackle with the same momentum. If he has a fast forward velocity, then you need to make sure you have an even greater velocity to take him down.
- Just like force and velocity, momentum is a vector. This tells you that when you are dealing with momentum in two or even three dimensions, you can separate the variables along the appropriate axes to simplify the problem.

#### Show What You've Learned

Using the information provided above, answer the following questions.

- If two objects have equal kinetic energy, is it possible to know which object has the greater momentum?
- If a quarterback comes to a complete stop after a head on tackle from one member of the opposing team, what can be said about the momentum of the quarterback and the person that tackled him?
- If in the previous question the quarterback came to a complete stop after being tackled by two competitors at the same time, what can be said about the relationship of their momentums?