Question

The team of Chicago Blackhawks, has hired us this season to explain to the new members, how physically it is important to attack at a specific point the body of the opponent to unbalance it and make it fall; In this way to be able to achieve the defense of the team and make it not achieve its objective. Based on actual fact for them to understand, we present the case of an Ice Hockey Player A who is 6 feet tall and has a mass of 69 kg. This one is in rest waiting for that they pass him the disc for the annotating points. Player B, which has a mass of 79kg, goes at a speed of 8m / s and is directed horizontally to the east to hit Player A. The impact must be somewhere above or below the center of mass to achieve The opponent's imbalance. In the two-player collision, player A becomes unbalanced by being struck at the top of the center of mass (waist), which causes a small rotation of the body and falls to the ground. Player B by gravity falls to the ground at the same time and above player A.

1) Explain, using only the variables of the formulas taught in class, as can be represented:

A) Energy conservation in this collision situation.

B) The Inertia of Player A, assuming it is a bar and its center of mass is the same center of the person.

C) Linear moment

D) Angular momentum

2) Show how with the rotation formula it is possible to calculate the best angle of attack to hit Player A above its center of mass and it falls to the ground. Note: When impacted at a greater distance from the center of mass, it will have a higher torque at the moment of that spin

Answer 1

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