P9: Motion Flashcards
How is speed calcualted
Distance(m)/ Time(s)
How is velocity calculated?
Distance/ Time
What does stationary look like on a distance-time graph?
A horizontal line
What does constant speed look like on a distance-time graph
A diagonal line
What is the gradient on a distance-time graph
Speed
(distance/time)
How can speed at a certain point be calculated on a curved line on a distance time graph.
Using a tangent and finding the gradient of the tangent at that specific point
How do you calculate average speed on a distance time graph?
Find the gradient of the line from the start to the end point
What is speed?
Speed is the rate of change of distance – it is the distance travelled per unit time. Like distance, speed does not have an associated direction, so it is a scalar quantity.
What is velocity?
The velocity of an object is its speed in a particular direction Velocity is a vector quantity because it has both a magnitude and an associated direction To calculate velocity, displacement is used in calculations, rather than distance.
What is acceleration?
The acceleration of an object is its change of velocity per second
What is acceleration measured in?
m/s^2
or distance/time^2
How can acceleration be calculated?
Change in velocity/ Time taken for change
What does a diagonal line represent on a velocity time graph?
Constant Acceleration/ decceleration
What does a horizontal line represent on a velocity time graph?
Constant speed
How can distance travelled be calculated on a velocity time graph?
The area on the graph below the line
What is the definition of deceleration?
The term deceleration or negative acceleration describes the rate at which an object slows down
How can deceleration be calculated?
(v(final)-v(initial))/ time
How is acceleration/ deceleration shown on a distance time graph?
A curved line
