3.l Flashcards
How do you calculate average speed?
Distance travelled / time taken
How do represent stationary on a d-t graph?
Straight horizontal line
How do you represent constant speed on a dt graph?
A straight (slopping) line
How do you find the speed using a d-t graphs?
gradient
What is instantaneous speed?
Its the speed of a object over a very short interval of time
How do you calculate instantaneous speed?
Draw the tangent to the particular time (dt graph)
Finish The sentence
The greater the gradient…
The greater the instantaneous speed
How do you calculate average velocity?
Change in displacement / time taken
How do find the velocity using displacement time graph?
The gradient
If the overall change in displacment is zero I what would the average velocity be?
AV = zero!
Have do you calculate acceleration?
Change in velocity / time taken
How do find the acceleration from a velocity time graph?
= the gradient
What does a straight vertical line(/) show in a-velocity time graph?
Constant acceleration , positive gradient
What does a straight horizontal(—) line show in a-velocity time graph?
Zero gradient , constant velocity, zero acceleration
What does a straight vertical DOWN() line show in a-velocity time graph?
Negative gradient, constant deceleration
