This lesson contains 19 slides, with interactive quizzes and text slides.
Items in this lesson
SPEED
GRADE-9
sept 22, 2020
Slide 1 - Slide
STARTER
Which car will be in first position?
and what about second and third position?
Slide 2 - Slide
OBJECTIVES
1. Define speed
2. Differentiate constant and changing speed
3. Calculate speed
Slide 3 - Slide
SPEED
Speed is the distance an object moves divided by the time it took to move that distance
Speed= distance travelled /time taken
Slide 4 - Slide
Slide 5 - Slide
Slide 6 - Slide
How are these two different?
Slide 7 - Slide
Constant speed - when the distance travelled is same during each second
Changing speed- when the distance travelled is not the same during each second
Slide 8 - Slide
What is speed?
A
How fast or slow an object moves
B
A kind of drug
C
Is moving faster and faster
D
A type of game
Slide 9 - Quiz
Identify the speed -constant or changing
Slide 10 - Open question
What are the two terms associated with speed ?
A
time, distance
B
time, direction
C
direction, distance
D
reference point, time
Slide 11 - Quiz
Identify this as constant speed or changing speed? Imagine it is the same car
Slide 12 - Open question
RECALL
Slide 13 - Slide
It takes Ahmed 50 s on his bicycle to reach his friend' house 250 m away. What is his average speed?
Slide 14 - Open question
A truck driver makes a trip that covers2,380 Km in 280 hours. What is the drivers' average speed?
Slide 15 - Open question
CHALLENGE -Aaron leaves one city at noon. He has to be at another city 186 km away at 3:00 P.M. The speed limit the entire way is 65 km/hr. can he arrive second city on time
Slide 16 - Open question
Challenge - During which period did the object slow down
Slide 17 - Slide
Which term describes the motion in the time period from 3 to 5 seconds?