| A | B |
|---|
| projectile | Any object that moves through air or through space, acted on only by gravity (and air resistance if any). |
| parabolic path | the path all projectiles follow, often called an arch; all or some portion of a parabola as defined by y = x2 |
| resultant vector | the vector sum of two or more component vectors. |
| horizontal component | the component of a resultant vector that lies along the horizontal axis, parallel to the ground for a projectile. |
| vertical component | the component of a resultant vector that lies along the vertical axis, perpendicular to the ground for a projectile. |
| range | the horizontal distance a projectile travels. |
| satellite | an object that falls around the Earth or some other body rather than falling into it. The satellite is the smaller of the two objects. |
| Height | the distance an object either falls from or goes up to in a projectiles path |
| apex | the highest point an object will go during its path, usually the mid way point in the range |
| vf=vi+at | formula to find final velocity - you need to know initial velocity, acceleration, and time |
| vi=vf-at | formula to find initial velocity - you need to know final velocity, acceleration, and time |
| a=(vf-vi)/t | acceleration if the final velocity and initial velocity and the time is known |
| dy=(1/2)at^2 | distance an object will cover if the acceleration and the time accerealted is known |
| dx=vx*t | horizontal range of a projectile |
| trajectory | the path a projectile follows |
| t=sqrt(2d/a) | time can be found by taking the square root of twice the distance an object went divided by the acceleration of the object) |
| g | acceleration due to earth's gravitational pull close to the earth's surface (approximately 10 m/s^2) |
| scale | a converting equality that can represent real life distances when drawing vectors (ex. 1 cm = 10 m/s) |
| arrow | used to represent a vector quantity in a scale drawing of situation. The direction of the arrow always shows the direction of the vector. |
| head to tail method | a method used to draw out vectors to help visualize vector addition. |
