Topic 2: kinematics Flashcards
Define distance
The length on an actual path between two points
Define displacement
The shortest length between two points
Define speed
distance divided by time
Define velocity
displacement divided by time
Define acceleration
change in velocity divided by time
What are the 5 SUVAT equations?
v = u + at
s = ( (v + u) /2 ) x t
s = ut + ½at^2
s = vt - ½at^2
v^2 = u^2 + 2as
How do you find the speed on a distance/time graph?
gradient
How do you find the velocity on a displacement/time graph?
gradient
How do you find the acceleration on a velocity/time graph?
gradient
How do you find the displacement on a velocity/time graph?
area
How do you find the change in velocity on an acceleration/time graph?
area
Describe the horizontal and vertical components of a projection
Horizontally, no forces are acting so there is no acceleration and there is constant velocity
Vertically, gravity is acting so there is an acceleration of g
What table do you use to solve projectile problems?
horizontal
s
u
t
s = ut
vertical
s
u
v
a
t
What happens to air resistance when something is accelerating?
it increases
When does an object reach terminal velocity?
When air resistance and weight are equal, meaning there is no acceleration.
