H202 Kinematics Flashcards
Define displacement
Displacement is the straight line distance from the start to the finish point in that direction.
Define distance
Distance is the total length of the actual path travelled between the start and the finish points.
Define velocity
Velocity is the rate of change of displacement
Define speed
Speed is the rate of change of distance
Formula of average velocity
Change in displacement/ Change in time
Define acceleration
Acceleration is the rate of change of velocity
Formula of average acceleration
Change in velocity / change in time
What does the gradient and area represent in a displacement-time graph?
Gradient: velocity
Area: nil
What does the gradient and area represent in a velocity-time graph?
Gradient: acceleration
Area: Change in displacement
What does the gradient and area represent in a displacement-time graph?
Gradient: nil
Area: Change in velocity
State the equations of motion
v = u + at
v^2 = u^2 + 2as
s = 1/2(u + v)t
s = ut + 1/2 at^2
What is a terminal velocity?
It is when an object is falling and there is zero net force acting on the object, the object will hence reach a final constant spped.
