Lesson 6 — 4.4 acceleration & speed-time graphs

Lessonplan

Notes

Topic: 4.4 acceleration and speed time graph

Speed is a change of distance over time.

acceleration is a change of speed over time.

Speed is how fast something moves

looked at formally it becomes — a change of distance over time.

Acceleration is about something speeding up.

Looked at formally it becomes — a change in speed over time.

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4.4

Working on exercises

2 lessons.

Lesson 1:

Learning goals

calculating acceleration
Rearranging the formula for acceleration
the unit of acceleration
reading a speet-time graph
Terminal velocity

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Slide 1: Slide

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This lesson contains 26 slides, with text slides.

Items in this lesson

Lessonplan

Notes

Topic: 4.4 acceleration and speed time graph

Speed is a change of distance over time.

acceleration is a change of speed over time.

Speed is how fast something moves

looked at formally it becomes — a change of distance over time.

Acceleration is about something speeding up.

Looked at formally it becomes — a change in speed over time.

openen

huiswerk bespreken

4.4

Working on exercises

2 lessons.

Lesson 1:

Learning goals

calculating acceleration
Rearranging the formula for acceleration
the unit of acceleration
reading a speet-time graph
Terminal velocity

Slide 1 - Slide

Slide 2 - Slide

This lesson

4.4 Acceleration & speed-time graphs

Slide 3 - Slide

Learning goals

Calculate acceleration
Define the unit for acceleration
Rearrange the formula for acceleration
Read a speed-time graph correctly
Explain terminal velocity

Slide 4 - Slide

What is

Acceleration?

Slide 5 - Slide

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Speed

A change in distance over time

Acceleration

A change in speed over time

Slide 7 - Slide

Speed

Acceleration

A change in speed over time

s p e e d = \frac{​ d i s t a n c e ​ ​}{​ t i m e ​}

Slide 8 - Slide

Speed

Acceleration

s p e e d = \frac{​ d i s t a n c e ​ ​}{​ t i m e ​}

a c c e l e r a t i o n = \frac{​ c h a n g e i n s p e e d ​ ​}{​ t i m e ​}

Slide 9 - Slide

Acceleration

a c c e l e r a t i o n = \frac{​ c h a n g e i n s p e e d ​ ​}{​ t i m e ​}

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a c c e l e r a t i o n = \frac{​ f i n a l s p e e d - s t a r t i n g s p e e d ​ ​}{​ t i m e ​}

Slide 11 - Slide

a = \frac{​ v ^{​ f ​ ​} - v ^{​ i ​ ​} ​ ​}{​ t ​} = \frac{​ Δ v ​ ​}{​ t ​}

a c c e l e r a t i o n = \frac{​ f i n a l s p e e d - s t a r t i n g s p e e d ​ ​}{​ t i m e ​}

( change) in speed)

Slide 12 - Slide

a = \frac{​ v ^{​ f ​ ​} - v ^{​ i ​ ​} ​ ​}{​ t ​}

a c c e l e r a t i o n = \frac{​ f i n a l s p e e d - s t a r t i n g s p e e d ​ ​}{​ t i m e ​}

a: acceleration
vf: final speed
vi: initial speed
t: time

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The unit of acceleration

m/s

Slide 14 - Slide

Why is the unit of

acceleration m/s ?

Slide 15 - Slide

Unit of speed

Unit of Acceleration

distance/time
m/s

speed/time
(m/s)/s

Slide 16 - Slide

Unit of speed

Unit of Acceleration

distance/time
m/s

speed/time
m/s

Slide 17 - Slide

Unit of Acceleration

speed/time
(m/s)/s

m/s

Slide 18 - Slide

Exercise

A car pulls up from standing still up to a speed of 22.4 m/s in 2.55s. Calculate its acceleration.

Answer: 8,78 m/s2

A roller coaster picks up speed as it rolls down the track. Starting with a speed of 4 m/s it accelerates to 22 m/s in three seconds. Calculate its acceleration. Answer 6 m/s2

why is the unit of acceleration m/s2?

Slide 19 - Slide

Exercise

Maurice cycles at a speed of 5m/s. Over a period of 6 seconds he accelerates to a speed of 8/ms. Calculate his acceleration. Answer 0,5 m/s2

Slide 20 - Slide

a = \frac{​ v ^{​ f ​ ​} - v ^{​ i ​ ​} ​ ​}{​ t ​}

a c c e l e r a t i o n = \frac{​ f i n a l s p e e d - s t a r t i n g s p e e d ​ ​}{​ t i m e ​}

The formula for acceleration

Slide 21 - Slide

The unit of acceleration

m/s

Slide 22 - Slide

Acceleration

a c c e l e r a t i o n = \frac{​ f i n a l s p e e d - s t a r t i n g s p e e d ​ ​}{​ t i m e ​}

Exercise

A race car accelerates from 18.5 m/s to 46.1 m/s in 2.47 seconds. Calculate its change in speed. Answer 11,17 m/s2

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Learning goals

Calculate acceleration
Define the unit for acceleration
Rearrange the formula for acceleration
Read a speed-time graph correctly
Explain terminal velocity

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Homework

Make worksheet 4.4

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Lesson 6 — 4.4 acceleration & speed-time graphs

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