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Apologia Physics M2
Apologia Physics M2 - One dimensional motion equations & free fall
| Question | Answer |
|---|---|
| free fall: | the motion of an object when it is falling solely under the influence of gravity; prevalent form of one-dimensional motion |
| v= | v(initial) + at |
| the area under a velocity-versus-time curve is equal to | the displacement caused by the motion |
| The equations from module 2 are valid | only when the acceleration is constant. |
| When free fall occurs, the | motion is occurring in a straight line and the acceleration of the body falling is constant. |
| When we neglect air resistance, all objects falling near the surface of the earth experience a constant acceleration of | 9.8 m/sec2 straight down. |
| When an object (such as tennis ball) is in free fall, the acceleration is constant, so the object | travels farther during each successive time interval. |
| When a physicist says "near the surface of the earth," | he/she typically means the object cannot be more than a few kilometers above the ground. |
| derivation | starts with something you know and uses math & reasoning to come up with something new |
| v2= v02 + 2aΔx | relates final velocity, initial velocity, acceleration, and displacement |
| Equations 2.6, 2.15, and 2.19 are only valid when acceleration is ___________________. | constant |
| Δx = vo*t + 1/2 a*t2 | general equation that relates displacement to initial velocity, acceleration, and time |
| Acceleration due to gravity is independent of the nature of the object experiencing free fall, as long as the object has ___________. | mass |
| air resistance | the drag that air produces on objects that are traveling through it |
| reaction time | the time elapsed between recognizing an event and reacting to it |
| When we throw a ball up in the air, it is still considered to be in __________ _________. | free fall |
| When an object is thrown upward in the presence of gravity, it will reach its maximum height when the object's velocity equals | zero. |
| terminal velocity | the velocity a falling object has when, due to air resistance, its acceleration equals zero |
| 3 things that affect the terminal velocity of an object | weight, shape, and orientation as it falls |
| Since gravity is weaker on the moon, it cannot accelerate things as strongly. So, acceleration due to gravity on the moon would be | smaller than that of earth. |
Created by:
MrsHough
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