AS Physics Unit 1.4 Linear Motion Flashcards
What is the definition of displacement?
Displacement is defined as the distance moved in a particular distance.
What is the definition of speed?
Speed is defined as the rate of change of distance in ms^-1.
What is the definition of velocity?
Velocity is defined a the rate of change of displacement in ms^-1.
What is the definition of acceleration?
Acceleration is defined as the rate of change of velocity in ms^-2.
What is the equation of the gradient for a displacement(s) - time (t) graph?
Gradient = Velocity = change in displacement / change in time.
How would you find the gradient of a velocity (v) - time (t) graph?
Gradient = Acceleration = change in velocity / change in time.
How to work out the distance travelled in a velocity-time graph?
The distance travelled is equal to the area trapped between the curve/ line and the time axis of a velocity-time graph.
How would you work out the area of a trapezium?
The equation is 0.5(u + v) x t.
What are the 4 equations of uniformly accelerated motion?
- V = u + at
- S = ut + 0.5 x at^2
- V^2 = u^2 + 2as
- S = 0.5( u + v )t
How do you know when an object is in “free fall”?
When the only force acting on it is gravity. All objects in gravity accelerate onwards at the same rate and does not depend upon the mass of the object.
