Physics- Topic 2/ Motion and Forces -Spec 1 Flashcards
Scalar vs Vector
Both have magnitude (a size) however, vector quantities have a direction- they can be negative.
Vector quantities
Displacement
Velocity
force
acceleration
momentum
Scalar quantities
Mass
Distance
Speed
Energy
Time
Current
Velocity
Speed in a stated direction
Average Speed =
Distance/Time
Avg velocity=
displacement/ time
x
distance
s
displacement or speed
v
velocity
Walking
1.5m/s
running
3m/s
cycling
6m/s
car
31m/s
aeroplane
250m/s
Distance time graph gradient
constant speed of the object
Distance time graph flat line
stationary
Distance time graph curved line
Speeding up or slowing down
Acceleration=
Change in velocity/time (s)^2
Deceleration and units
When an object’s acceleration is minus units =m/s^2
Acceleration with velocity and time
((Final velocity^2)-(Initial velocity^2)m^2))/ Time taken (s)
1) A=
(V-U)/T
Acceleration, distance, velocity
((Final velocity m/s(^2))-((Initial velocity m/s)(^2)m^2)= 2x acceleration m/s^2 x distance m
2) Equation
v^2-u^2=2ax
u
Initial velocity
