This document discusses speed, distance, and time calculations using the speed equation. It provides three examples of using the speed equation to calculate distance or time given two of the variables. It also includes a table to fill in missing time or speed values and two additional practice problems calculating total distance and average speed for a car's journey, and converting between m/s and km/h for a helicopter's speed.

1. 9.2- More about the
speed equation
Sir. Muhammad Abdul Mageid

2. Rearranging the
speed equatioin
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3. 1.
Finding the distance
travelled
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4. “
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5. 2.
Finding the time taken
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6. “
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7. Examples
✘ Example 1 : A racehorse travels at an average speed of 12 m/s
for 30 s . What distance does it cover ?
Distance travelled = average speed × time taken
Distance travelled = 12 m/s × 30 s = 360 m
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8. Examples
✘ Example 2 : A tram travels at an average speed of 15 km/h for 30
minutes . What distance does it cover?
Distance travelled = average speed × time taken
Distance travelled = 15 km/h × 0.5 h = 7.5 km
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9. Examples
✘ Example 3 : What is the time it takes for a motorboat to travel 1000
m if the boat has a steady speed of 20 m/s?
𝑇𝑖𝑚𝑒 𝑡𝑎𝑘𝑒𝑛 =
𝑑𝑖𝑠𝑡𝑎𝑛𝑐𝑒 𝑡𝑟𝑎𝑣𝑒𝑙𝑙𝑒𝑑
𝑎𝑣𝑒𝑟𝑎𝑔𝑒 𝑠𝑝𝑒𝑒𝑑
𝑇𝑖𝑚𝑒 𝑡𝑎𝑘𝑒𝑛 =
1000 𝑚
20 𝑚/𝑠
= 50 𝑠
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10. Questions
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11. 1.
Complete this table to show the missing values
for time or speed
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Object Speed Distance Time
Rocket 20 000 km/h 30 h
Eagle 17 m/s 4000 m
Snail 5 cm/s 100 cm

12. 2.
A car travels 50 km/h for 2 h . Then the car travels
at 30 km/h for 1 h and finally it travels at 40 km/h
for 2 h
a) what is the total distance travelled by the car?
B) what is the average speed the car travelled for
whole journey
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13. 3.
A helicopter flies at 50 m/s .
What is this speed in kilometres per hour
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To convert from km/h to m/s ×
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To convert from m/s to km/h ×
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14. thanks!
Any questions?
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