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# Ticker timer

## by Idrul Nafiz, Physics Teacher at Freelance tutor on May 12, 2011

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ticker timer & ticker tape slideshow by idrul nafiz

ticker timer & ticker tape slideshow by idrul nafiz

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## Ticker timerPresentation Transcript

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