Recording movements

• Natuurkunde / Scheikunde
• Middelbare school
• vwo
• Leerjaar 2

H5 Movement

5.1 Recording movements

At the end of this section you can...

1. Name the different ways for recording movements.
2. Explain how you can make a stroboscopic photo.
3. Fill in a distance-time table.
4. Draw a distance-time diagram.

How can you record movements?

Filming motion

• 30 frames per second
• Show SCALE with a ruler.
• Camera is standing on 1 place.

What is a stroboscopic photo?

1. A few pictures after each other.
2. A flash combined with a camera.
3. A light combined with a camera.
4. A picture that was made in a danceclub.

In 1 second there are 4 flashes. On a stroboscopic photo you see 8 images. How many seconds was the movement on de the photo?

1. 1,5 seconds
2. 1,75 seconds
3. 1,9 seconds
4. 2 seconds

Quantity

• Time: t in s
• Distance: x in m
• Speed: v in m/s of km/h

Quantity = what jou measure.

Unit = tells you about what quantity you measured.

What is the unit for time?

What is the symbol for the quantity distance?

1. m
2. M
3. s
4. x

Hoe vul je een tabel in?

Kolom 1

• what you know!
• line 1: quantity + unit
• order of the measuringpoints

How to fill in a distance-time table?

Kolom 2

• what you don't know = measurings!
• line 1: quantity + unit
• order of the measuringpoints

How to drawn a distance-time table

1. Always use a pencil and geo-triangle
2. x-as = horizontally = what you know (kolom 1)
3. y-as = vertically = what you measured (kolom 2)
4. logic  partition of both axles.
5. Name the axles: quantity AND unit!
6. Place points for every measuringpoint.
7. Drawn a smooth line through or along the measuringpoints.

Important!

The steeper the diagram is, the faster the movement is!

Which diagram is showing a 'constant speed'?

What kind of movement is diagram D?

1. an accelerated movement
2. a constant movement
3. a slowed movement
4. no movement, the object stands still...

Time to work

5.1 reading and excercises

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Presenteren!!!!