Serratus anterior 2. Pectoralis minor 3. Involved Combining translatory and rotary motion. Since all the limbs in the body move in a rotary fashion around a joint it is necessary to combine the movements of two or more joints to produce a linear motion by that body segment. Effects of momentum.
Acceleration is proportional to force.
Acceleration, important in achieving a Feat final velocity, is proportional to the force causing it, providing the mass is held constant. Meaning that if the force is doubled, the rate of acceleration is also doubled, etc. Counter-force in striking activities. The amount of force a strike implemented imparts to an object depends on the combined momentum of the implement and the object at the moment of impact. Any give in the implement or the object at impact reduces the force.