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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
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Time interval between 2 consecutive dots ( 1 tick) is 1/50s or 0.02s
To calculate time: No. of tick x 0.02s
. . . .
1 dot1 tick
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TEST YOURSELFWhat are the time taken for:
. . . . . .
. . .
. . . . .
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Besides time taken ticker timer is also used to determine:
a)Velocityb)Accelerationc)Types of motiond)Distance
HOW TO MEASURE VELOCITY? ACCELERATION?
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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
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DETERMINE ACCELERATION
Determine time of 1 partFind initial velocityFind final velocityTotal time = (Total parts - 1) x time of one partACCELERATION = v-u
t
. . . . . . . . . . .
A B C D E F
2cm8 cm
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IMPORTANT!!!*To find acceleration: Total time = (Total parts - 1) x time of one part
*To find velocity:Use a normal method without -1 !
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TRY THIS!!
Find :a)Accelerationb)Average speed
. . . .
5 cm7 cm6 cm
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TYPE OF MOTION
Distance between dot is sameObject moving with constant speed
. . . . . . .Direction of motion
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Distance between dot is increasingObject moving faster / accelerate
. . . . . . . . . .Direction of motion
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. . . . . . . . . . . . .Direction of motion
The object is _____________________
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The object is moving very _______________
…………………………………………….Direction of motion
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Ticker timer can be used to determine:
(State 4!)
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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?
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Vibrating steel strip will vibrate _________ times in a second
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Draw the diagram of ticker tape that shows the object is moving with decreasing velocity