Recording movements

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

H5 Movement

H5 Movement

Do assignments 1,2,3,4,5,6,7,8

You may discuss the question in a low volume. 

If you finish early go read paragraph 5.2

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 there 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 you 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?

X axis

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

How to fill in a distance-time table?

Y axis

• 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 
3. y-as = vertically = what you measured 
4. logic  partition of both axes.
5. Name the axis: quantity AND unit!
6. Place points for every measuring point.
7. Drawn a smooth line through the measuring points.

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...