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Sci 8 Force
Force and Motion
| Question | Answer |
|---|---|
| speed | the distance traveled divided by the time it takes to travel that distance |
| average speed | total distance traveled divided by the total time taken to travel the distance |
| instantaneous speed | the speed of an object at one instant of time |
| velocity | speed AND direction of a moving body |
| displacement | the distance between the starting and ending points AND the direction in which you travel |
| Law of Conservation of Momentum | total momentum of objects that collide with each other is the same before and after the collision |
| acceleration | the change in velocity divided by the time for the change to take place; occurs when an object speeds up, slows down or turns. |
| mass | amount of matter in an object |
| inertia | tendency of an object to resist a change in motion |
| momentum | measure of how difficult it is to stop a moving object (mass x velocity) |
| speed formula | d/t (distance divided by time) |
| velocity formula | d/t + direction (distance divided by time plus direction) |
| acceleration formula | sf-si/t (final speed subtract initial speed divided by time) |
| work | a force action through a distance; the transfer of energy through motion |
| work formula | w = f x d |
| power | rate at which work is done or energy is used |
| power formula | p = work/time or p = force x distance/time |
| pressure | force divided by the area over which the force is applied (pressure = force/area) |
| hydraulic cylinder | machine that uses fluid pressure to multiply input force |
| mechanical advantage | the number of times the machine multiplies the effort force (MA - FR/FE) |
| Newton's first law of motion | an object that is a rest or in uniform motion tends to stay at rest or in uniform motion respectively until acted upon by an outside force |
| Newton's second law of motion | The net force on an object is equal to the mass of the object multiplied by the acceleration of the object (Force = Mass x Acceleration) |
| Newton's third law of motion | For every action, there is an equal and opposite reaction |
| Lines on distance-time graphs represent _____ | velocity |
| Lines on velocity-time graphs represent____ | acceleration |
Created by:
satsherry
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