On The Move Flashcards
What is displacement
Distance in a given direction
What is speed
A change in distance per unit time
Velocity is defined as
Change of displacement per unit time
Speed equation
V(speed) =s(displacement)/t(time)
Equation for an object moving at a constant speed on a circle
V(speed)= 2 pi r (radius) / t(time)
Equation for average speed
Average speed = Δ s(displacement)/Δ t(time)
How to find speed on a distance time graph
Gradient
How to find velocity on a displacement time graph
Gradient
What is a key difference between a distance time and a displacement time graph
Distance time = speed as gradient
Displacement time = velocity as gradient
Definition of acceleration
Change of velocity per unit time
What is the unit of acceleration
Meters per second per second (ms^-2)
What is uniform acceleration
The velocity of a moving object in a straight line changes at a constant rate
Equation for acceleration
A(acceleration) = V(final velocity)-U(initial velocity) / T(time)
How to find non-uniform acceleration from a graph
Acceleration = gradient of the line on the velocity time graph
What is acceleration due to gravity
9.81
When can suvat rules be applied
Only when acceleration is constant
First key principle with projectiles
The acceleration of an object is always equal to g and is always only affects vertical vector
Second key principle of projectile motion
The horizontal velocity is constant because acceleration lacks horizontal component
Third key principle of projectile motion
The motion in the horizontal and vertical component are independent of each other
Whats a tool that can be used to prove projectile motion theory
A stroboscope
