Describing motion Flashcards
What is the formula for speed?
speed (m/s) = distance travelled (m)/ time taken (s)
What is the difference between average speed and instantaneous speed?
Average speed is the speed over the entire journey where as instantaneous speed is the speed over a short given distance of journey
What is the displacement of an object?
The distance an object has travelled from its starting point, in a given direction.
On a displacement time graph how would: a stationary object; an object moving in a straight line with constant speed and a object moving with an increasing speed, look?
Stationary object would be a flat line at the distance from the starting point, a moving object with constant speed is a straight line with a gradient of the speed, an accelerating object appears as a curve
On a speed time graph how would: a stationary object; an object moving in a straight line with constant speed and a object moving with increasing speed but with no change of direction, look?
On a speed time graph, a stationary objects would be flat line at 0m/s, an object with constant speed would be flat at the speed it is constantly at, increasing speed is a flat line going up with a gradient equal to the acceleration
What is acceleration?
It is the change in speed over an interval of time
On a velocity time graph how would: a stationary object; an object moving in a certain direction with constant speed and a object moving with increasing speed but with an certain direction, look?
On a velocity time graph a stationary object would be a flat line at 0m/s, an object moving in a certain direction with constant speed would be a flat line at the speed it’s travelling, an increasing speed in a certain direction would be a sloped line with a gradient equal to the acceleration
What is the formula for acceleration?
acceleration (m/s^2) = change in velocity (m/s) / time taken (s)
