Kinematics Flashcards
Total movement of an object without any regard of directions. It is a scalar quantity and therefore has only magnitude
Distance
As defined as the change in position of an object. It is a vector quantity and has magnitude and direction.
Displacements
It is represented as an arrow that points from the starting position to the final position. It seems like a shortcut.
Displacements
Speed is a scalar quantity. The…..of a moving body is the actual speed at which it is moving at any instances.
Instantaneous speed
Speed formula
V= ds/dt
Formula of speed using differentials
d/du ( u^n )= nu^n-1
Where:
u=t
du= dt
n= exponents
Often a body in motion does not move at a constant speed. During even in short trips, a car speeds up( accelerates), and slows down ( decelerates). Thus, the total distance traveled by a body during a period of time is often the results of an….
Average speed
Average speed equation
V= s/t
Average speed unit
V
Distance sign
s
If the speed is truly constant ( uniform speed) the equation will be
V=s/t
As useful as it is, the average speed of an object does not reveal anything about the directions of a motion. To take into account of directions, the vector concept of the velocity is needed.
Average velocity
Average velocity formula
V = s/t where s is displacement and t is the elapsed time
In average velocity, for uniform motion the formula is
V= s/t
In solving average velocity, before solving the s. Consider the formula first..
× 1000m/1km which results the unit of “m”
For the sign, left and down axis of vectors is….
Negative sign
For the sign, right and up axis is…
Positive sign
It is the rate at which the speed (velocity), is changing with time.
Acceleration
In acceleration, if the speed of the body is increasing., the acceleration is
Positive
In acceleration, if the speed is decreasing, the acceleration is
Negative
To find acceleration, we should follow the formula
a= ∆v/t where the ∆v is the change in speed and t is time required to change the speed
True or false? Acceleration is not always constant.
True
The change in speed of the body is the difference between it’s final speed ( v) and it’s original speed (Vo) by following the formula
a= v - Vo/ t
If we look for FINAL SPEED OF UNIFORM ACCELERATION, the formula will be
V=Vo + at
Formula for Distance Traveled for Uniform Acceleration
s= ½ (Vo + v)t
Formula used for distance traveled pero Wala ang FINAL SPEED, pero naay given na ACCELERATION
s= Vot + ½at²
What formula is used when ACCELERATION, FINAL VELOCITY AND ORIGINAL VELOCITY is given
s= v² - vo²/ 2a
