3.1 Motion Flashcards
What is acceleration?
The rate of change of velocity
What is average spped?
The distance over time for the entire region of interest
What is displacement?
The direct distance between an objects starting and ending positions. It is a vector quantity and so has both a direction and a magnitude
What is braking distance?
The distance travelled between the brakes being applied and the vehicle coming to a stop. It is affected by the vehicle and the road conditions
What are displacment time graphs?
Plots showing how displacement changes over a period of time. The gradient of the graph gives the velocity. The curved line represents an acceleration.
What is freefall?
An object is said to be in free fall when the only force acting on it is the force of gravity
What is instantaneous speed?
The exact speed of an object at a specific given point
What is projectile motion?
The motion of an object that is fired from a point and then upon which only gravity acts. When solving projectile motion problems, splitting the motion into horizontal and vertical components is useful.
What is reaction time?
The time taken to process a stimulus and trigger a response to it. It is affected by alcohol, drugs and tiredness
What is stopping distance?
The sume of thinking distance and braking distance for a driven vechile
What are velocity time graphs?
Plots showing how velocity changes over a period of time. The gradient gives acceleration. Curved lines represent changing acceleration
What is velocity?
The rate of change of displacement. It is a vector quantity and so has both a direction and a magnitude.
