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motion and stuff
ch 1 and 2
| Question | Answer |
|---|---|
| whats a reference point? | place or object used for comparison to determine if something is in motion |
| when is an object in motion? | if it changes position relatice to its refernce point |
| whats the equation for average speed? | s=d/t, speed=distance/time |
| whats acceleration? | change in velocity divided by the time it takes for a change to occur |
| whats speed? | the distance traveled divided by the time taken to travel the distance |
| whats the avg speed? | same thing as speed practically use same equation |
| instantaneous speed is? | the speed of an object at one instant of time |
| whats velocity? | the speed of the object and the direction of its motion |
| whats the mass? | amount of matter in an object |
| whats inertia | when an object resists to a change in motion |
| whats momentum ? | the measure of how hard it is to stop the object |
| what does momentum depend on? | mass and velocity |
| The law of the conservation of the momentum? | the total momentum of the objects that collide is the same before and after the collision |
| whats the equation to find out velocity? | avg speed equation |
| whats the acceleration equation? | final speed-initial speed/time or Sp-Si/t |
| whats the equation of momentum? | p=mv or momentum=mass*velocity |
| whats the equation for force? | force=mass*acceleration or F=kg*m/s2=1N |
| whats velocity? | speed and direction |
| whats acceleration? | change in velocity |
| whats the acceleration of gravity? | 9.8m/s2 |
| whats force? | a push or pull |
| whats balanced force? | equal in size, opposite in direction |
| whats the net force? | the resulting force after all the forces have been added |
| What was newtons 1st law of motion? | matter in motion tends to stay in motion unless acted on by another force. |
| whats friction? | force that opposes sliding between 2 surfaces that are touching |
| what does friction depend on? | pressure and surface |
| what are the types of friction? | static friction:no motion, sliding friction:sliding hands up & down, rolling:like a car or bike down a hill |
| whats gravity ? | force thats exerted between two objects that pull it together |
| what does gravity depend on? | mass |
| whats newtons 2nd law of the motion? | big things need big pushes little things need little pushes |
| what is force measured in? | newtons ex. 50kg*10m/s=500N |
| what is distance? | the length u travel |
| whats displacement? | the direction and difference in position between your starting and ending points |
| whats a balanced force/ | no motion |
| whats unbalanced force? | motion |
| what happens for every reaction? | theres and equal or opposite reaction |
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VaLeRiA!
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