CHAPTER 9 Flashcards
(25 cards)
what does the gradient on a distance-time graph represent
speed
equation for speed
distance/time
unit of speed
m/s
what does a flat line of a distance-time graph show
the object stops moving
what does a straight line of a distance-time graph show
it is travelling at a steady speed
what dos a curved line on a distance-time graph show
acceleration or deceleration
what is velocity
speed in a given direction
what is displacement
the distance travelled in a given direction
what is the acceleration of an object
its change in velocity per second
equation for acceleration
change in velocity/ time taken for the change
unit for acceleration
m/s^2
what is deceleration
when an object slows down
what does the gradient on a velocity-time graph represent
acceleration
what do flat sections on a velocity-time graph represent
the object was travelling at a steady speed
what does a steeper gradient show
a greater acceleration or speed
what does a curve on a velocity-time graph show
changing acceleration
how to find the acceleration at a curved point on a graph
use the tangent
in a velocity-time graph, what does the area under the graph show you
the distance travelled across that period of time
what does braking do
reduce the velocity of a vehicle
how to show braking on a graph
deceleration
how can you measure velocity change
attach a motion sensor to a computer
how to find the gradient of a graph
turn a section of the line into a triangle and do the difference in y divided by the difference in x
how to calculate the distance travelled if the graph is complex
break it down into smaller, more manageable shapes
how to find the acceleration/speed of a curved graph at any point in time
draw tangent at where the time meets the curve turn this into a triangle calculate gradient
