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# Ticker-timer

Extracts from this document...

Introduction

Report

Aim:

To calculate the acceleration of the dynamic trolley by using various methods.For eg. Ticker Timer, Motion Sensor.

Theory/backround information: Acceleration is the rate of change in velocity.

Therefore, a=(v-u)/t ;where u is the initial velocity, v is the final velocity and t is the time taken.

Part 1: Ticker Timer

Materials:

• Dynamic trolley
• Ticker timer
• Carbon/paper tape
• Wooden blocks
• Table
• Cello tape
• Electricity appliance

Method:

1. Take one or two wooden blocks and put them under the table to tilt the table.
2. Place the ticker timer at the top of the table but make sure that it should not fall due to the slope of the table.

Middle

2

0.0360

0.10

0.36

3

0.0240

0.10

0.24

Where

d1 =distance covered at first

t1 =time taken to cover d1

u=initial speed

Percentage uncertainty of d1 = 0.0005 x 100% = 2.083%

0.0240

Percentage uncertainty of t1 = 0.01 x 100% =        %

0.10

Percentage uncertainty of  u =

 Trials d2(in m)+ 0.0005 m t2 (in s)+ 0.01 s v=d2/t2 ( in m/s ) + 1 0.0930 0.10 0.93 2 0.0980 0.10 0.98 3 0.0850 0.10 0.85

Where

Conclusion

2 = 0.01 x 100% =        %

0.10

Percentage uncertainty of  v =

Processed Data :

 Trials u=d1/t1  ( in m/s ) + v=d2/t2 ( in m/s ) + Total time taken(t) in s Acceleration (a=(v-u)/t) in m/s2 1 0.35 0.93 1s 0.58 2 0.36 0.98 1s 0.62 3 0.24 0.85 1s 0.61

Percentage uncertainty of  u =

Percentage uncertainty of  v =

Percentage uncertainty of  a =

CONCLUSIONS :

The highest acceleration is 0.62m/s2 and the lowest acceleration is 0.58m/s2 .The average acceleration is 0.603m/s2. There are some uncertainties in measurement´.

Evaluations:

I had some problems due to accuracy of acceleration as the distance was in very small scales. Moreover I faced difficulty in handling with uncertainties.

But on the whole I managed to do the investigation properly and to some extent accurately.

This student written piece of work is one of many that can be found in our International Baccalaureate Physics section.

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