Physics- Motion Flashcards
In the equation, what does distance equal.
distance (m) = speed (m/s) x time (s)
using ticker tape timer-
A set of closely but equally spaced dots =
At a steady pace or relatively slowly
A set of equally spaced dots quite far apart =
Fast pace, still steady
A set of dots getting further apart =
accelerating
Speed may tell us how fast or slow an object is moving, but it does not tell us which direction the object is moving. If we wish to include the direction we should use the term …
velocity
If two cars, both moving at 60 km/h, passed each other travelling in opposite directions on a road, they would have the same speed but different…
velocities
The velocity of one car might be 60 km/h due north and the velocity of the other 60 km/h due south. Quite often we distinguish velocities in opposite directions by using…
+ and - signs.
Quantities involving both a magnitude (size) and a direction are known as….
vectors
Velocity and displacement are
vector quantities.
Speed and distance do not involve direction. They are known as …
scalars
Accelerating……. velocity
increases
Decelerating ……… velocity
decreases
(equation) change in velocity =
time taken x acceleration
What do each of the following letter stand for in this equation?
v - u = t x a
a = acceleration u = initial velocity t = time taken v = represents final velocity
In a graph, the acceleration is given by the gradient or slope of the speed/time (or velocity/time) graph. In a velocity time graph, the gradient =
acceleration.
