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Physics Review
| Question | Answer |
|---|---|
| Expression for velocity. | v=x/t |
| Expression for acceleration. | a=v/t |
| Value for the acceleration of objects in free fall. | 9.8 meters per second squared |
| Physical quantity that has both a magnitude and direction. | vector |
| If a certain car is traveling down the road at a certain velocity and then slows down to travel only half as fast as before. What fraction would this be of the original velocity? | 1/2 |
| Coordinate system for specifying the precise location of objects in space. | frame of reference |
| Cause of acceleration or a change in an object's motion. | force |
| Forces that exist between objects even in the absence of direct physical contact. | field force |
| Tendency of an object to maintain its state of motion. | inertia |
| Newton's Second Law of Motion | F=ma |
| Simultaneous equal but opposite forces resulting from the interaction of two objects. | action-reaction pairs |
| Formula for work. | W=Fx |
| Work is done when | displacement is not zero. |
| Form of energy associated with an object in motion. | kinetic energy |
| Form of energy associated with an object due to its position. | potential energy |
| Equations for power. | P=F d/t or P=Fv or P=W/t |
| Equation for momentum. | p=mv |
| Forces that exist between objects in direct contact. | contact forces |
| A large constant force acting over a long time interval causes a large change in momentum. | Ft=p |
| Two objects move separately after colliding, and both the total momentum and total kinetic energy remain constant. | elastic collision |
| Two objects move together after colliding, and and kinetic energy is not conserved. | inelastic collision |
| Angles equals 2 pi rad | 360 degrees |
| One radian equals | 57.3 degrees |
| Quantity that measures the ability of a force to rotate or accelerate an object around an axis. | torque |
| Farther the force is from the axis of rotation | more torque produced |
| Newton's second law for rotating objects | net torque = moment of inertia x angular acceleration |
| Time it takes to complete a cycle of motion | period |
| Relation of frequency and period in simple harmonic motion | inversely related |
| Phase difference between two waves that are traveling in the same medium when they undergo constructive interference. | 0 degrees |
| How we perceive sound (high or low) depends on the frequency of the sound wave | pitch |
| Number of cycles per unit of time | frequency |
| Repelling force occurs between two charged objects when | charges are of like sign. |
| Attracting force occurs between two charged objects when | charges are of unlike signs. |
| Easily transfers charge | conductors |
| Does not easily transfer charge | insulator |
| Charges on their surface do not move | electric insulator |
| Three resistors connected in series carry currents. | I total = I1 = I2 = I3 |
| Three resistors connected in series have voltages. | ΔV total = ΔV1 + ΔV2 + ΔV3 + |
| Three resistors connected in series have resistance. | R total = R1 + R2 + R3 + |
| Three resistors connected in parallel carry currents. | I total = I1 + I2 + I3 + |
| Three resistors connected in parallel have voltages. | ΔV total = ΔV1 = ΔV2 = ΔV3 |
| Three resistors connected in parallel have resistance. | 1/R total = 1/R1 + 1/R2 + 1/R3 + |
Created by:
missphysicsteach
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