Chapter 2 (kinematics) Flashcards
What is uniform speed
When the distance travelled by an object for every unit time is the same
What is the difference between distance and displacement
Distance
-Total length covered by a moving object regardless of the direction of motion
-Is a scalar quantity
Displacement
-The distance measured in a straight line from a fixed reference point
-Is a vector quantity
What is acceleration
Acceleration is the rate of change of velocity
When does an object undergo acceleration
-Speed or direction changes
-Both its speed or direction changes
What is uniform acceleration
When the velocity of an object for every unit of time is the same
What is uniform acceleration
The constant rate of change of velocity
Formula for acceleration
a= v-u/Tv-Tu
(T and velocity must be positive)
What is non-uniform acceleration
When the rate of change of velocity for every unit of time of a moving object is not the same
What does the gradient of a displacement time graph give
The velocity of the object
What does the gradient of a velocity time graph give
The acceleration of a moving object
What does the area under a velocity time graph give
The displacement of the object
