Speed

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Slide 1: Slide
ScienceLower Secondary (Key Stage 3)

This lesson contains 22 slides, with interactive quizzes and text slides.

Lesson duration is: 50 min

Items in this lesson

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- Disrespectfull behaviour will not be tolerated

Slide 1 -Slide

Unit 4 Physical world
Chapter 26 - Speed

Slide 3 -Slide

What is the connection

Distance
Time
Speed
cm
km
m
mm
s
h
m/s
km/s
cm/s
mm/s

Slide 9 -Slide

What is the correct way to calculate speed
A
S=d + t
B
S=d - t
C
S=d / t
D
S=d x t

Slide 10 -Quiz

What is the correct way to calculate time
A
t = d + S
B
t = d/S
C
t = S - d
D
t = d - S

Slide 11 -Quiz

What is the correct way to calculate distance
A
d = s x t
B
d = t + s
C
d = s/t
D
d = t - s

Slide 12 -Quiz

What is velocity?
• Velocity is how fast an object or an person moves.
• it can present itself in km/h or m/s
• Acceleration is a type of velocity

What is
Acceleration?

But also

Deceleration

Slide 17 -Slide

Speed
• A change in distance over time

Acceleration
• A change in speed over time

Slide 18 -Slide

Speed
• A change in distance over time
• Speed = Distance/time

Acceleration
• A change in speed over time
• Acceleration = (End speed-start speed)/time taken for change in speed

Slide 19 -Slide

Acceleration = (End speed-start speed)/time taken for change in speed

A car is moving at a speed of 4 ms-1. After 12s it is moving at a speed of 28ms-1. Calculate the acceleration of the car.

Slide 20 -Open question

Awnser
Acceleration = (End speed-start speed)/time taken for change in speed
=(28-4)/12
=24/12
= 2 ms -2

Slide 21 -Slide

Make excercises + flashcards
Flashcards:
Speed + formula
Velocity
Acceleration + formula

Excercises:
Page 167 - 2 - 6, 10, 12
What you can't finish will be homework!