Motion, equations and graphs Flashcards
What is a scalar quantity?
A scalar quantity is fully described by its magnitude and unit.
What is a vector quantity?
A vector quantity is fully described by its magnitude unit AND direction.
How do toy find the resultant force?
Arrange all forces tip-to-tail and calculate the resultant
How do you find the resultant force when the forces aren’t at right angles?
Find the horizontal and verticals components of all forces and then use Pythagoras and trig.
How to find Vhorizontal?
Vcos(angle)
How to find Vvertical?
Vsin(angle)
What is the gradient of the line equal to in displacement-time graphs?
The velocity of the object (a negative gradient signals a change in direction.
In velocity-time graphs what is the gradient of the line equal to?
The acceleration of the object
In a velocity-time graph what is the area under the graph equal to?
The displacement travelled
What does it show if the line on a velocity-time graph cuts the time axis?
Change in direction
What does the area under an acceleration-time graph equal?
The velocity of an object
