Chapter 1 -Motion Flashcards
What is distance ?
The separation between two points
What is displacement ?
Distance in a specific direction
Say if distance and displacement is scalar or vector
Distance : scalar
Displacement : vector
What is a scalar quantity ?
A quantity with size only
What is a vector quantity ?
A quantity with size and direction
Whats the equation for speed ?
distance
speed = ——————-
time
What is the unit for speed and velocity ?
m/s
What is the equation for average speed ?
total distance
average speed = ————————-
time
What is the equation for the rate of change of speed ?
final speed - initial speed
ROCOS = —————————————
time taken
Is the rate of change of speed vector or scalar and what are it’s units ?
scalar m/s^2
What is velocity ?
The distance travelled in unit time in a specified direction
What’s the equation for average velocity ?
displacement
average velocity = ———————
time
also = initial velocity + final velocity
——————————————
2
What is acceleration ?
When the velocity of a body increases or decreases
What’s the equation for acceleration ?
final velocity - initial velocity
acceleration = ———————————————
time
What’s the alternate equation for acceleration (v,u,a,t)
v - u v = final velocity
a = ——- u = initial velocity
t t = time
What do you put on the x and y axis of a distance time graph ?
x axis : time
y axis: distance
What does a horizontal line on a distance-time and a displacement-time graph show?
The body is stationary
What do you put on the x and y axis of a Speed-time graph ?
x axis : time
y axis : speed
How do you find the distance travelled from a speed-time graph ?
The distance travelled is the area underneath the graph.
What does on the x and y axis of a displacement-time graph
x axis : time
y axis : displacement
What does the gradient of a displacement-time graph show ?
velocity
What’s on the x and y axis of a velocity-time graph ?
x axis :time
y axis : velocity
What does the area under a velocity-time graph show ?
the displacement travelled ?
What does the gradient in a velocity-time graph show ?
acceleration of the body
