Velocity time graphs Flashcards
change in time
What do velocity time graphs do?
Velocity is a vector has directtion and speed
Show how velocity of a moving object varies with time
The velocity (speed) will go on the y axis and the time on the x axis.
Similar to distance time graphs but instead of distance there is velocity. Velocity time graphs can be used to calcultae distance.
Acceleration
Magnitude
Slope
What information does a velocity time graph show?
.If an object is moving at constand accelration/ decelration
.Magnitude of accerlration/ decelration
.Straight line shows constant velocity
.Slope shows magnitude
.Steep slope = larger accelration/ decelration (if the speed changed quickly)
.Gentle slope = smaller accelration/ decelration (if speed changes gradually)
. Horrizontal lines means accelration/ decelration
.
Simlar rules to distance time graps just with speed and accerlration
Remeber a straight line is constant velocity not accelration because accelration is a change in velocity so can not be accelration if it is constant.
Similar to speed calculation on a distance time graph
What can accelration be calculate by?
Remeber the equation for accelration but add it to a graph
Accerlration = gradient = rise/ run
Depending on the question the accerlation equation may also be needed
If the question says to fine one point just do rise/ run but if the question is between two points keep in mind accelration= change in velocity (new velocity - inital velocity)/ time (an additional part because it is a graph subtract the two time points)
Equation for distance= speed x time
What is the calculation for distance in a velcoity time graph?
Distance (area under graph) = vertical axis x horrizontal axis
What does the area under a velocity time graph represent?
Displacement (distance)
Can their be more than one shape found under a velocity time graph when calculating distance?
Yes
Somtimes there can be a trinagle and a sqaure. Both are claucltaed sepreatly then added togther at the end. Area of a traingle is calculated as 1/2 x horrizontal axis x vertical axis
Can accelration be constant/ uniform?
Yes
Just means that accelration is changing at a constant rate
Not a dramtic change just an equal change each time. Shown as a straight horrizontal line
