| Term | Definition |
|---|
| 1st newton law of inertia | body in motion stays in motion a body at rest stays at rest unless acted on by an external force |
| F=M2V2-M1V1/DELTAt =t2 t1 | force equals mass squared times velocitysquared minus mass times velocity devided by change of time is eqyual to time squared minus time |
| 2nd newton law of acceleration | body has a mass and has acceleration the product of the two will give the force |
| F=MA | force equals mass times accelleration |
| 3rd newton law of action | fore every action there is an equal and opposite action |
| F/A=MA/A OR M=F/A | force equals mass times acceleration divided by accelartion and mass equals force divided by acceleration |
| forces that are applied in straight line | add F+F+F+ |
| forces applied oppositely in a straight line | subtract smaller F from larger F |
| forces applied in different planes | pythagorian theorum lines are infinate so at some point angles will meet |
| triangle sides | opposite, adjacent, hypotenues (crooked one of right angle) |
| h2=o2+a2 | hypotenuse squared equals opposite squared plus adjacent squared |
| equilibrium | net torque is = 0 balanced |
| torque | see-saw how effective the force is in producing a movement |
| find torque | force times perpendiuclar point of application of the force to the fulcrum |
| weight arm | side of rigid bar with the weight |
| effort arm | side of rigid bar with effort |
| types of equilibrium | stable, neutral, unstable |
| stable equilibrium | center of gravity is at the lowest possible position (closest to floor) in a human when he is lying down |
| neutral equilibrium | no change in center of gravity |
| unstable equilibrium | base of support is small - greater the base the greater the stability males have less stability narrow hips and small pelvis thigh |
| factors that influence CFG center of gravity | posture, pregnancy, foot wear |
| size of base in the principle of stabilityof support | wider base of support the greater stability |
| line of gravity principle of stability | for good stability and balance line of gravity should fall center of BOS |
| mass in principle of stability | greater the mass greater stablitiy |
| momentum in principle of stability | how long it would take a body in motion to rest - the greater the momentum the longer it would take |
| friction in the principle of stability | greater the friction the greater the stability |
Combine with other sets
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