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Published byAlberta Clark Modified over 9 years ago
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1 Study the motion of an object with ticker timer 2 Calculate speed velocity acceleration and deceleration based on ticker timer 3 Solve problems on linear motion using equations of motion
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What is ticker timer?
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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 dot 1 tick
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TEST YOURSELF What are the time taken for:............................
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Besides time taken ticker timer is also used to determine: a) Velocity b) Acceleration c) Types of motion d) 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 part Find initial velocity Find final velocity Total time = (Total parts - 1) x time of one part ACCELERATION = v-u t........... ABCDEF 2cm 8 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) Acceleration b) Average speed.... 5 cm 7 cm 6 cm
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TYPE OF MOTION Distance between dot is same Object moving with constant speed.............. Direction of motion
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Distance between dot is increasing Object 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
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