1. Big Tam drove from Glenrothes to London at a steady speed of 60km/h.
Speed, Distance, Time
DISTANCE
Big Tam drove from Glenrothes to London at a steady speed of 60km/h.
After 1 hour,he had driven
60km
After 2 hours,he had driven
120km
After 3 hours,he had driven
180km
After 5 hours,he had driven
300km
D = S x T
Distance = Speed x Time
Rule?

2. EXAMPLE 1
Billy runs at a steady speed of 4 metres per second for 55 seconds. How far has he travelled?
Billy runs at a steady speed of 4 metres per second for 55 seconds. How far has he travelled?
D = S x T
D = 4 x 55
D = 220 m

3. EXAMPLE 2
A boat travels at a steady speed of 12km/h for 8 hours How far has it travelled?
A boat travels at a steady speed of 12km/h for 8 hours How far has it travelled?
D = S x T
D = 12 x 8
D = 96 km

4. D = S x T D = 40 x 3.5 D = 140 miles EXAMPLE 3
A cyclist cycles for 3½ hours at an average speed of 40 miles per hour How far has she travelled?
A cyclist cycles for 3½ hours at an average speed of 40 miles per hour How far has she travelled?
D = S x T
D = 40 x 3.5
D = 140 miles

5. He then travels on to Aberdeen. The 100 mile journey takes 2 hours.
AVERAGE SPEED
Finally, he drives to Edinburgh.It takes 4 hours to travel a distance of 180miles.
Jim drove from Glasgow to Inverness, a distance of 180 miles. It took him 3 hours.
He then travels on to Aberdeen. The 100 mile journey takes 2 hours.
His AVERAGE SPEED for the journey is
60mph
His AVERAGE SPEED for the journey is
50mph
His AVERAGE SPEED for the journey is
45mph
S = D T
RULE?
Speed =
Distance
Time

6. EXAMPLE 1
Billy runs the 400 metres at his school sports day in 80 seconds.What was his average speed for the race?
Billy runs the 400 metres at his school sports day in 80 seconds.What was his average speed for the race?
S = D T
S =
400 80
S = 5 m/s

7. EXAMPLE 2
Billy cartwheels from Glasgow to Edinburgh – a distance of 48 miles- in 12 hours. Calculate his average speed ?
Billy cartwheels from Glasgow to Edinburgh – a distance of 48 miles- in 12 hours. Calculate his average speed ?
S = D T
S = 48 12
S = 4 mph

8. EXAMPLE 3
Superbilly flies from Earth to the planet of Wengaria. It takes him 20 hours, and is miles away. Find his average speed. SB SB
S = D T SB SB SB SB SB SB SB SB SB SB SB
Wengaria
< Earth14000
S =
14000 20
S = 700mph

9. TIME
Last year, he had been chased for 240 miles at an average speed of 60mph
His brother Billy had been chased for 140 miles at an average speed of 70mph.
He was chased for 150 miles, and his average speed was 50mph..
Jim has been a naughty boy, and is being chased by the police.
The chase lasted for
3 hours
Time =
Distance
Speed
RULE?
T = D S
This chase lasted for
4 hours
This chase lasted for
2 hours

10. D T= S 800 T = 4 T = 200seconds EXAMPLE 1
Billy runs the 800 metres at his school sports day in an average speed of 4 m/s.How long did it take him? T= D S
T =
800 4
T = 200seconds

11. D T= S 24000 T = 3000 T = 8 minutes EXAMPLE 2 Says Billy Teacher Knows
Billy parachutes from a height of feet. He falls at a speed of 3000 feet per minute. How long does it take him to reach the ground? T= D S
T =
24000
3000
T = 8 minutes
Best
Teacher
Billy
Says
Knows

12. D T= S 1800 T = 450 T = 4 hours EXAMPLE 3 My hero!
Grrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr!!!
No problem, ma’am. It’s what I do
My hero!
Thank you SuperBilly
SuperBilly is flying to save a lady falling from a building. He is flying at 450mph, and the building is 1800 miles away. How long will it take him to reach the lady? T= D S SB SB SB SB SB SB SB SB SB SB SB SB SB SB SB SB SB SB
T =
1800
450
T = 4 hours