Forces 1.1 – What is Speed?
What is speed?
What is speed?
SPEED is a
measure of how
FAST an object is
MOVING.
What is speed?
Snail = 0.047
km/h
Racing
car = 360
km/h
Runner = 19
km/h
SPEED is a
measure of how
FAST an object is
MOVING.
What is speed?
To calculate SPEED we
need to know two
things:
1. How FAR the object
has travelled =
DISTANCE.
2. How LONG the object
has been travelling for
= TIME
What is speed?
THE FORMULA
SPEED = DISTANCE
TIME
What is speed?
THE FORMULA
SPEED = DISTANCE
TIME
d
S
t
What is speed?
THE FORMULA
SPEED = DISTANCE
TIME
d
S
t
What is speed?
THE FORMULA
SPEED = DISTANCE
TIME
TIME = DISTANCE
SPEED
d
S
t
What is speed?
THE FORMULA
SPEED = DISTANCE
TIME
TIME = DISTANCE
SPEED
DISTANCE = SPEED x TIME
d
S
t
What is speed?
Metres per second - m/s
Don’t forget
the units!
What is speed?
Metres per second - m/s
Don’t forget
the units!
Miles per hour - mph
What is speed?
Metres per second - m/s
Don’t forget
the units!
Miles per hour - mph
Kilometres per hour –
km/h
What is speed? - Keywords
Speed: How much distance is covered in how much time
Average speed: The overall distance travelled divided by
overall time for a journey
Now copy
these
keywords onto
your
vocabulary
sheet.
What is Speed?
It’s quiz
time!
Q1 Which of these is not a unit of speed?
mph
m/s
n/m
Q2 what two things do we need to know to calculate
speed?
distance and mass distance and time time and
mass
Q3 what formula do we use to calculate distance?
speed x time
speed x mass
mass x time