2 3 Measuring an Inaccessible Height 2 3
2. 3 Measuring an Inaccessible Height
2. 3 Measuring an Inaccessible Height INACCESSIBLE HEIGTH = a height which you can not measure directly • you can measure such height using CLINOMETER What is Clinometer?
What is Clinometer?
What is Clinometer? • It is an instrument that helps us measure inaccessible heights!
How Does It Work?
YOUR PROJECT Each of you will construct a clinometer and then measure various things around the school
YOUR PROJECT Your assignment and quiz will be based on being able to use clinometer!
What Do You Need? 1. A copy of a 180° protractor 2. Scissors 3. Hodometer or measuring tape 4. A piece of cardboard 5. A drinking straw 6. Glue or adhesive tape 7. A needle and thread 8. A small metal washer or weight
How Do You Make It? Ø Glue or tape the paper protractor to the cardboard. Ø Carefully cut it out Ø Use the needle to pull the thread through the cardboard at the centre of the protractor Ø Secure thread to the back of the cardboard with tape. Ø Attach the weight to the other end of the thread Ø Tape the drinking straw along the baseline of the protractor for use as a sighting tube
How Do You Use It? Ø Read the instructions on the pages 84 AND 85 Ø Look at my demonstrations
How Do You Use It? Your Distance from the object Object TOTEM POLE Height (ground to eye) Measure of an angle
How Do You Use It? Your Distance from the object Object TOTEM POLE 5. 0 m Height (ground to eye) Measure of an angle
How Do You Use It? Your Distance from the object Height (ground to eye) 5. 0 m 1. 5 m Object TOTEM POLE Measure of an angle
How Do You Use It? Your Distance from the object Height (ground to eye) Measure of an angle 5. 0 m 1. 5 m 12° Object TOTEM POLE 12° x 5. 0
How Do You Use It? Your Distance from the object Height (ground to eye) Measure of an angle 5. 0 m 1. 5 m 12° Object TOTEM POLE x = 23. 52315… x = 23. 5 meters 12° x 5. 0
How Do You Use It? Your Distance from the object Height (ground to eye) Measure of an angle 5. 0 m 1. 5 m 12° Object TOTEM POLE x = 23. 52315… x = 23. 5 meters 12° x = 23. 5 meters 5. 0
How Do You Use It? Your Distance from the object Height (ground to eye) Measure of an angle 5. 0 m 1. 5 m 12° Object TOTEM POLE 23. 5 1. 5 5. 0
How Do You Use It? Your Distance from the object Height (ground to eye) Measure of an angle 5. 0 m 1. 5 m 12° Object TOTEM POLE 23. 5 + 1. 5 = 25. 0 m 23. 5 1. 5 5. 0
HOMEWORK • Worksheet • Due in two days (Wed, July 16)
- Slides: 19
