Motions Flashcards
How can speed be calculated on a distance-time graph?
The speed of an object can be calculated by the slope of a distance-time graph.
What is the velocity of an object?
The velocity of an object is its speed in a particular direction.
How can you work out acceleration from a velocity-time graph?
The slope on a velocity-time graph represents the acceleration of an object.
What 2 things has a vector quantity got?
A vector quantity has got both size and a direction.
What 4 things are vector quantities?
- displacement
- velocity
- acceleration
- force
What is displacement?
Displacement is the distance traveled in a straight line. It has both direction and size.
What is velocity?
The velocity of an object is its speed in one particular direction.
What is acceleration?
The acceleration of an object is calculated from its change in velocity and the time taken.
What is the equation for speed?
speed (per second, m/s) = distance (metre, m) divided by time taken (second, s)
What is the equation for the gradient of a distance-time graph?
gradient = change in y divided by change in x
The steeper the line..
..the greater the acceleration of the object.
What does a negative gradient represent on a velocity-time graph?
A negative gradient represents an object with a constant deceleration - slowing down.
What is the acceleration equal to on a velocity-time graph?
The acceleration is equal to the gradient of a velocity-time graph.
What is the distance travelled equal to on a velocity-time graph?
The distance travelled is equal to the area under a velocity-time graph.
How do you work out the distance travelled on a velocity-time graph?
You work out the area under a velocity-time graph.
