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'17 1D motion review
Review of 1D motion and intro to forces
Question | Answer |
---|---|
Distance divided by time | speed |
Change in position relative to the frame of reference | motion |
Starting point used to measure motion (system for specifying an objects location) | Frame of Reference |
Quantity that has magnitude only | Scalar Quantity |
Quantity that has both magnitude and direction | Vector Quantity |
Change in velocity divided by time | Acceleration |
Velocity if returning back to starting position | 0 m/s |
acts on an object to change its motion or state of rest | force |
Shortest distance between 2 points during motion | Displacement |
Displacement divided by time | Velocity |
the complete/total path of motion made by an object | distance |
2 ways to have zero acceleration | at rest or constant velocity |
ways to accelerate | speed up, slow down, change direction |
2 ways to have positive acceleration | speed up in (+) direction , slow down in (-) direction |
2 ways to have negative acceleration | slow down in (+) direction , speed up in (-) direction |
slope on a position vs. time graph | speed |
on a position vs. time graph, this shows object is moving in positive direction | positive slope |
on a position vs. time graph, this show object is at rest | line is straight (zero slope) |
on a position vs. time graph, this shows object is moving in negative direction | negative slope |
use this to find the magnitude of displacement of 90 degree motion (right angle) | Pythagorean Theorem |
on a velocity vs. time graph, this shows object is speeding up | line goes away from x-axis |
force that always opposes motion | friction |
slope on a velocity vs. time graph | acceleration |
on a velocity vs. time graph, this shows object is moving in positive direction | line is in "top" quadrant |
on a velocity vs. time graph, this shows object is moving in negative direction | line is in "bottom" quadrant |
on a velocity vs. time graph, this shows object is slowing down | line goes toward x- axis |
on a velocity vs. time graph, this shows object has constant velocity | line is straight (zero slope) at a non-zero value |
on a velocity vs. time graph, this shows object is at rest | line is straight (zero slope) at zero only |
object traveling in a circle has this acceleration | centripetal |
frictional force that acts on moving objects | kinetic |
frictional force that acts on stationary objects | static |
this is used to find the degrees of direction of 90 degree motion (right angle) | tan^-1 (atan) |