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Apologia Physics M4
Motion in Two Dimensions
| Question | Answer |
|---|---|
| We approach two-dimensional problems by looking for the _________-___________________ part of the problems. | one-dimensional |
| When a projectile is fired at an angle relative to the ground, its motion is called _________________, meaning it follows the curved path of a parabola. | parabolic |
| Once a cannonball leaves the cannon, the only things acting on it is | gravity. |
| Gravity only acts in the ___- dimension. | y |
| Gravity does NOT affect the ____-component of velocity. | x |
| The x-component of the velocity vector stays ______________ the same LENGTH & points in ______________ the same DIRECTION for the entirety of the flight of the object. | exactly; exactly |
| In the middle of a projectile's trip, gravity has reduced the Y-COMPONENT of the velocity to ___________, | zero |
| When the velocity is point in the same direction as gravity's pull, the y-component of the velocity ________________ , making the object fall even faster. | increases |
| Parabolic motion is motion that occurs when an object moves in | 2 dimensions but has 0 acceleration in one of those dimensions & a constant, non-zero acceleration in the other. |
| When a projectile reaches its ________________ height, the y-component is zero. | maximum |
| A projectile will land with the exact _________________ velocity to what it started with. | opposite |
| The speed of a projectile is the __________ when it lands as it was when it launched. | same |
| The projectile reaches it maximum height at the ________________ of its journey. | midpoint |
| The range equation from this module ONLY applies when the ______________________________ is at the SAME level as the origin point of the projectile. | target/end point |
| We are calculating the range of a projectile when we | determine the distance that it travels in the x-dimension. |
| initial speed = | Vo |
| To determine the y-component of a projectile, we use | Voy=Vo*sin(O) O=angle |
| If we know the initial velocity in the y-dimension, we can | calculate the time it takes for the projectile to reach its maximum height. |
| g= | gravity |
| range = | {original velocity squared * sin (2*angle)] / gravity (Equation 4.9) |
| Equation 4.9 ONLY applies to | projectiles that land at the same height from which they are launched. |
| Conventionally speaking, a positive sign means | upward motion. |
| Conventionally speaking, a negative sign means | downward motion. |
| When starting and ending height are different, we may have to solve for the | y-dimension and then use the information to solve for the x-dimension (or vice versa). |
Created by:
MrsHough
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