Chapter 3.1 - Motion Flashcards
Instantaneous Speed
The speed at a certain time
Displacement
A vector quantity that represents how far an object has travelled from its starting point in a given direction
Average Speed
Distance / Time
Average Velocity
Displacement / Time
Distance
A scalar quantity that shows how far something travelled along a certain route
Velocity
A vector quantity that shows rate of change of displacement
Acceleration
A vector quantity, the rate of change of velocity
Gradient of displacement-time graph
Velocity
Gradient of velocity-time graph
Acceleration
Area under velocity-time graph
Displacement
The 4 SUVAT equations
v = u + at s = 0.5(u + v)t s = ut + 0.5at^2 v^2 = u^2 + 2as (s = vt - 0.5at^2)
value of g
9.81
Acceleration of a body in free fall
-g
Is horizontal velocity independent of vertical
yes
The two types of approaches for measuring g
Direct e.g. timing a falling ball
Indirect e.g. timing a pendulum