P9- Motion Flashcards
What does the gradient on a distance-time graph represent?
Speed
How does the distance-time graph look for a stationary object?
constant-speed object?
Horizontal line
Straight line that slopes upwards
Velocity
Speed in a given direction
Acceleration
Change of velocity per second
Deceleration
Change of velocity when an object slows down
On a velocity-time graph what is a horizontal line?
positive gradient line?
negative gradient line?
Constant velocity
Acceleration
Deceleration
What does the area under the line on a velocity-time graph represent?
The distance travelled in a given direction (displacement)
How to find the gradient of a line on a graph?
Gradient= height of triangle / base of triangle
How to find speed on a distance-time graph when not a straight line
-Draw tangent at the point
-Draw triangle from the tangent
-Calculate gradient of triangle
Accuracy
Result that is close to the true value
Precision
Results that have little spread between the mean value
High precision meaning?
High accuracy meaning?
Low range of data
Close to true value
An object moving round in a circle
Direction of motion?
Speed?
Velocity?
Changes continuously
Constant
Not constant
