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# Ticker timer

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ticker timer & ticker tape slideshow by idrul nafiz

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### Ticker timer

1. 4. <ul><li>Is a device used to study the motion of an object for a short period of time </li></ul><ul><li>Vibrating steel strip will vibrate 50 times every second and make 50 dots a second on a tape being pulled through </li></ul>
2. 5. <ul><li>Time interval between 2 consecutive dots ( 1 tick) is 1/50s or 0.02s </li></ul><ul><li>To calculate time: No. of tick x 0.02s </li></ul>. . . . 1 dot 1 tick
3. 6. TEST YOURSELF <ul><li>What are the time taken for: </li></ul>. . . . . . . . . . . . . .
4. 7. <ul><li>Besides time taken ticker timer is also used to determine: </li></ul><ul><li>Velocity </li></ul><ul><li>Acceleration </li></ul><ul><li>Types of motion </li></ul><ul><li>Distance </li></ul><ul><li>HOW TO MEASURE VELOCITY? ACCELERATION? </li></ul>
5. 8. DETERMINE VELOCITY <ul><li>How may ticks that you can see? </li></ul><ul><li>Can you calculate the time taken? </li></ul><ul><li>What are the distance? </li></ul><ul><li>Thus: </li></ul><ul><li>VELOCITY = DISTANCE UNIT?? </li></ul><ul><li> TIME TAKEN </li></ul>. . . . . . . . . 12cm A B
6. 9. DETERMINE ACCELERATION <ul><li>Determine time of 1 part </li></ul><ul><li>Find initial velocity </li></ul><ul><li>Find final velocity </li></ul><ul><li>Total time = (Total parts - 1) x time of one part </li></ul><ul><li>ACCELERATION = v-u </li></ul><ul><li> t </li></ul>. . . . . . . . . . . A B C D E F 2cm 8 cm
7. 10. IMPORTANT!!! <ul><li>*To find acceleration: </li></ul><ul><li>Total time = (Total parts - 1) x time of one part </li></ul><ul><li>*To find velocity: </li></ul><ul><li>Use a normal method without -1 ! </li></ul>
8. 11. TRY THIS!! <ul><li>Find : </li></ul><ul><li>Acceleration </li></ul><ul><li>Average speed </li></ul>. . . . 5 cm 7 cm 6 cm
9. 12. TYPE OF MOTION <ul><li>Distance between dot is same </li></ul><ul><li>Object moving with constant speed </li></ul>. . . . . . . Direction of motion
10. 13. <ul><li>Distance between dot is increasing </li></ul><ul><li>Object moving faster / accelerate </li></ul>. . . . . . . . . . Direction of motion
11. 15. . . . . . . . . . . . . . Direction of motion The object is _____________________
12. 16. <ul><li>The object is moving very _______________ </li></ul>…………………………………………… . Direction of motion
13. 17. <ul><li>Ticker timer can be used to determine: </li></ul><ul><li>(State 4!) </li></ul>
14. 18. <ul><li>In the study of linear motion of a trolley on a runway; the time taken for the movement of the trolley is recorded by a ticker timer </li></ul><ul><li>TRUE OR FALSE? </li></ul>
15. 19. <ul><li>Vibrating steel strip will vibrate _________ times in a second </li></ul>
16. 20. <ul><li>Draw the diagram of ticker tape that shows the object is moving with decreasing velocity </li></ul>
17. 21. Next Lesson  <ul><li>Read subtopic INERTIA </li></ul><ul><li>Submit your book every THURSDAY </li></ul>