Chapter 3 - Speed Flashcards
What is the equation for Speed?
Speed (v) = distance (d)/time (t)
What is Instantaneous Speed?
Instantaneous speed is the speed at any instant. (Ex. The speedometer on a car shows instantaneous speed).
Is motion relative?
Yes! Unless stated otherwise, we always mean relative to the surface of the Earth.
What is the equation for Average Speed?
Average speed (u) = total distance covered (d)/time interval (t)
What is Velocity?
Velocity is speed & direction.
What is Constant Velocity?
Constant speed & constant direction.
What is Changing Velocity?
When either the speed or direction changes.
What is Acceleration?
Acceleration is how quickly and in what direction velocity changes.
What is the equation for Acceleration?
Acceleration (a) = change in velocity/time interval (t).
What is Deceleration?
Deceleration is when speed slows.
What is Free Fall?
Free fall is when a falling object is free of ALL restraints. It falls only under the influence of gravity.
What is the equation for Instantaneous Velocity?
velocity (v) = gravity (g) x time interval (t)
g = 10 m/s^2
What is the equation for Distance Traveled?
Distance traveled (d) = 1/2 x gravity (g) x time interval (t)
g = 10 m/s^2