Lesson 10 — 4.4 acceleration & speed time graphs

This lesson
• rearranging the formula for acceleration
• speed-time graphs

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Slide 1: Tekstslide
Natuurkunde / ScheikundeMiddelbare schoolhavo, vwoLeerjaar 2

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This lesson
• rearranging the formula for acceleration
• speed-time graphs

Slide 1 -Tekstslide

Learning goals 4.4
• Calculate acceleration
• Define the unit for acceleration
• Rearrange the formula for acceleration
• Read a speed-time graph correctly
• Explain terminal velocity

Slide 2 -Tekstslide

Learning goals 4.4
• Calculate acceleration
• Define the unit for acceleration
• Rearrange the formula for acceleration
• Read a speed-time graph correctly
• Explain terminal velocity

Slide 3 -Tekstslide

Learning goals 4.4
• Calculate acceleration
• Define the unit for acceleration
• Rearrange the formula for acceleration
• Read a speed-time graph correctly
• Explain terminal velocity

Slide 4 -Tekstslide

Recap
• What is the formula for acceleration

Slide 5 -Tekstslide

acceleration=timefinalspeedstartingspeed

Slide 6 -Tekstslide

a=tvfvi
acceleration=timefinalspeedstartingspeed

Slide 7 -Tekstslide

a=tvfvi
acceleration=timefinalspeedstartingspeed
• a: acceleration
• vf: final speed
• vi: initial speed
• t: time

Slide 8 -Tekstslide

Unit of Acceleration
• speed/time
• (m/s)/s

Slide 9 -Tekstslide

Unit of Acceleration
• speed/time
• (m/s)/s

m/s
2

Slide 10 -Tekstslide

Exercise
Mike goes for a run. At the start of his run he runs at a speed of 7 m/s. 25 seconds later he runs at a speed of 4 m/s. Calculate his acceleration.

Slide 11 -Tekstslide

Rearranging the formula for speed
a=tvfvi
3=26

Slide 12 -Tekstslide

• Elevators in in the Yokohama tower in Japan are among the fastest in the world. They accelerate upwards at a rate of 3.125 m/s2 for 4 seconds. Starting from rest, what is their final speed?

• A cyclists cycles at a speed of 5/ms. He accelerates at a rate of 1.26 m/s2 for 6.3 seconds. Calculate his final speed.

Slide 13 -Tekstslide

Speed-time graphs

Slide 14 -Tekstslide

Speed-time graphs

Slide 15 -Tekstslide

Speed-time graphs

Slide 16 -Tekstslide

The area under the graph

Slide 17 -Tekstslide

Terminal velocity

Slide 19 -Tekstslide

Learning goals 4.4
• Calculate acceleration
• Define the unit for acceleration
• Rearrange the formula for acceleration
• Read a speed-time graph correctly
• Explain terminal velocity