click below
click below
Normal Size Small Size show me how
U01 Vocab
Motion/Free Fall
Term | Definition |
---|---|
-/+ signs | direction indicators |
horizontal | left to right |
vertical | up and down |
scalar | a quantity without given direction, displayed as a line representing size (magnitude) of a measurement or variable |
vector | a quantity that contains a direction, displayed with an arrowhead representing a size (magnitude) and direction for a measurement or variable |
delta | greek letter (triangle) which means a change in |
magnitude | the size or amount of a measurement |
direction | the route an object is headed, shown as a compass direction indicators, -/+ signs, worded indicators (left, right, up, down) |
speed | how fast or slow something changes positions, units (m/s) |
velocity | how fast or slow something changes position that also must include a direction, units (m/s) |
constant velocity | a constant change in position over time, every second that passes by an object moves the same distance, units (m/s) |
zero velocity | an object at rest, no motion, written as 0m/s |
initial velocity | the velocity an object has before an changes occur, written as v(subtitle)0 |
increasing velocity | speeding up, getting faster; a positive slope on a position vs. time graph |
decreasing velocity | slowing down, getting slower; a negative slope on a position vs. time graph |
terminal velocity | the maximum velocity an object can contain while in free fall, it is when the downward force of gravity is equal to the upward force of air resistance (forces are balanced, acceleration = 0m/s^2) |
gravity | a force of attraction between any two objects, most offend analyzed between an object and Earth, units (N) |
acceleration | a change in velocity; the rate at which velocity is changing over time, it can occur in 3 ways: speeding up, slowing down, or changing direction (meters per second, second or m/s^2) |
acceleration due to gravity | the rate at which an objects accelerate due to the force of attraction between an object and Earth, (-9.8 m/s^2) |