P9- Motion Flashcards
What does the gradient of a line on a distance-time graph represent?
speed
What unit is speed?
metres per second (m/s)
what symbol is speed?
v
What is distance traveled measured in?
metres
What can the d/s*t equation be used to calculate?
the average speed of an object whose speed varies
What should you do in the exam when time is given in minutes or hours in these calculations?
always convert it into seconds
A steeper gradient equals to a?
faster speed
What is velocity?
speed in a given direction
An object that travels at constant velocity travels at what?
a constant speed without changing its direction (straight line)
What is the word used for the distance travelled in a given direction?
displacement
What is the acceleration of an object?
its change of velocity per second
What is the unit of acceleration?
metre per second squared (m/s^2)
Any object with a changing velocity is?
accelerating
How can we work out average acceleration?
change in velocity/ time taken for the change
How to find the change in velocity?
final velocity-initial velocity