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Physics Midterm
| Question | Answer |
|---|---|
| set of conditions used to specify an object’s position in space & time | frame of reference |
| shortest path of motion | displacement |
| total path of motion | distance |
| distance/ time | speed |
| displacement/ time | velocity |
| (change in velocity)/ time | acceleration |
| quantity with magnitude only | scalar quantity |
| quantity with magnitude & direction | vector quantity |
| speed up , slow down, change direction | 3 ways to accelerate |
| speed up in + direction OR slow down in - direction | positive acceleration (2 ways) |
| speed up in - direction OR slow down in + direction | negative acceleration (2 ways) |
| motion that forms a right triangle | 90 degree motion |
| motion that forms a straight line | linear |
| study of the nature & properties of matter & energy | physics |
| change in position | motion |
| "an object in motion tends to stay in motion until acted on by a net force" | 1st law of motion |
| resistance to change in motion (summarizes 1st law) | inertia |
| F = m*a | 2nd law of motion |
| "for every action force there is an equal and opposite reaction force" | 3rd law of motion |
| anything that can cause object to accelerate | force |
| force that must touch the object it acts on | contact force |
| force that does NOT touch the object it acts on | field force |
| anything that has been thrown or shot | projectile |
| motion that all projectiles have | parabolic |
| contact force that acts in the opposite direction of motion | friction |
| friction that acts on stationary objects | static friction |
| friction that acts on moving objects | kinetic friction |
| sum of all the forces acting on object | net force |
| illustration of all the forces acting on object | Free Body Diagram |
| force x distance | work |
| SI unit for Work and Energy | Joules |
| SI unit for Power | Watts |
| energy based on position (height) [ m*g*h ] | Potential Energy (PE) |
| energy based on motion [ 0.5m*v^2 ] | Kinetic Energy (KE) |
| sum of PE and KE | Mechanical Energy (ME) |
| a disturbance that carries energy from 1 place to another | wave |
| wave with particles that move parallel | longitudinal wave |
| wave with particles that move perpendicular | transverse wave |
| wave with particles that move parallel & perpendicular | surface wave |
| material that a wave moves through | medium |
| wave that does NOT need a medium to pass through | electromagnetic wave |
| wave that DOES need a medium to pass through | mechanical wave |
| # of waves that completed in set amount of time | frequency |
| time it takes to complete 1 wave | period |
| top of a wave | crest |
| height of a wave | amplitude |
| bottom of a wave | trough |
| distance between the same points of 2 consecutive waves | wave length |
| is needed to do work | energy |
| mass x velocity | momentum |
| states that total momentum is conserved in all collisions in a closed system | law of conservation of momentum |
| objects collide & separate | elastic collision |
| objects collide & stick together | inelastic collision |
Created by:
cadetjt
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