Measurements
Acceleration
Observe the diagrams of accelerating cars. Calculate the accelerations of cars during first 10 seconds. Calculate also values of acceleration with higher gears. Can you pair diagrams with car information pictures?
Sinulla ei ole tarvittavia oikeuksia lähettää mitään.
Accelerating cars
Measuring distances with ultrasound sensor
Measure your own or someone elses movement near ultrasound sensor. Try to produce similar curves than curves A-F in picture . Discribe the movement, velocities and acceleration. Return a textfile, remember to include names of all group members.
Sinulla ei ole tarvittavia oikeuksia lähettää mitään.
Measuring density
- A group should have:
1. A scale (for mass)
2. Measuring sylinder (for volume)
3. A sample to be measured.
4. If the sample consists of objects of very complicated form, about 50 ml of water.
5. Each in the group should have a table for observations.
- Measure mass and volume of the sample at least ten times. Values should be distinct from each other.
- Analyse the data measured with Geogebra -take a screenshot of the picture.
- Return a file that contains the screenshot and a short report of the result, compare the density measured with value of tablebook.
1. A scale (for mass)
2. Measuring sylinder (for volume)
3. A sample to be measured.
4. If the sample consists of objects of very complicated form, about 50 ml of water.
5. Each in the group should have a table for observations.
- Measure mass and volume of the sample at least ten times. Values should be distinct from each other.
- Analyse the data measured with Geogebra -take a screenshot of the picture.
- Return a file that contains the screenshot and a short report of the result, compare the density measured with value of tablebook.
Sinulla ei ole tarvittavia oikeuksia lähettää mitään.
Measuring an angle
1. Using a compass and a ruler draw three sectors of different sizes. Make sure that central angle is the same for all three.
2. Use the ruler to measure radius [[$ r $]] and bow [[$ b $]] of each sector.
3. Calculate maximum and minimum values of radius and bow using assumption that when using ruler you can measure with accuracy of 1 mm.
4. Use your calculator to get ratio [[$ \frac{b}{r} $]].
5. Calculate also ratios [[$ \frac{b_{max}}{r_{min}} $]] and [[$ \frac{b_{min}}{r_{max}} $]]. Use these to get your measurement uncertainty.
6. The value calculated is value of angle in radians. Radian unit is quite common in science.
7. Compare your three results and results of others together.
2. Use the ruler to measure radius [[$ r $]] and bow [[$ b $]] of each sector.
3. Calculate maximum and minimum values of radius and bow using assumption that when using ruler you can measure with accuracy of 1 mm.
4. Use your calculator to get ratio [[$ \frac{b}{r} $]].
5. Calculate also ratios [[$ \frac{b_{max}}{r_{min}} $]] and [[$ \frac{b_{min}}{r_{max}} $]]. Use these to get your measurement uncertainty.
6. The value calculated is value of angle in radians. Radian unit is quite common in science.
7. Compare your three results and results of others together.