• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Conservation of Momentum Experiment.

Extracts from this document...

Introduction

Data Collection and Processing:

• [Data Table #1]Final Lab Data(Raw):
 Cue Puck Stationary Puck Mass of Puck ±1g 553 551 Angle of Movement ±0.1° 39.0 [S of E] 40.0 [N of E] Average Initial Length Between  Dots ±0.01cm 1.40 N/A (Stationary) Average Final  Length Between  Dots ±0.01cm 0.88 0.90 Frequency of Spark Timer 50Hz 50Hz
• Since the spark timer used in the lab was set at 50Hz per second, 50 dots are made for every second-which also means that one dot is 1/50th of a second, the velocity of the two pucks can be determined from this relationship with the use of  , (to reduce rounding errors, all momentum calculations will be done in the base unit give:  ) :

Average Initial Velocity of Cue Puck in the  Direction:  Average Final Velocity of Cue Puck:  Average Final Velocity of Stationary Puck:  Propagation of Uncertainties for Velocity of Pucks:

Uncertainty of Ruler: ±0.01cm:

Average Initial Velocity:

Cue Puck:  =1.136…%

Stationary Puck: N/A No Movement

Average Final Velocity:

Cue Puck:  Stationary Puck:  =0.90%

Uncertainty of Mass of Puck: 1.0g:

Cue Puck:  Stationary Puck:  Final Percent Uncertainty for Average Initial Velocity of Cue Puck: 1.136…%+0.180…%=1.317%

Final Percent Uncertainty for Average Initial Velocity of Stationary Puck: N/A No Movement

Final Percent Uncertainty for Average Final Velocity of Cue Puck: 0.714…%+0.180…%=0.895%

Final Percent Uncertainty for Average Final Velocity of Stationary Puck: 0.90%+0.18145=1.081%

We can now convert the percent uncertainties into absolute uncertainties:

Final Abs. Uncertainty for Average Initial Velocity of Cue Puck:  = 0.

Middle

Average Initial Length Between  Dots ±0.01cm

1.40

N/A (Stationary)

Average Final  Length Between  Dots ±0.01cm

0.88

0.90

Frequency of Spark Timer

50Hz

50Hz

Avg Initial Velocity (x Direction)

70.00±  cm/s

N/A (Stationary)

Avg Final Velocity

44.00±0.39cm/s

45.00±0.49cm/s

The Experiment Can Be Summarized By The Following Diagram: Both the x and y directions needs to be considered in order to solve this question:

Subscript c will represent the cue puck and Subscript s will represent the stationary puck.

If friction in the system can be ignored:

∑Pi=∑Pf

X: Pcx+Psx= Pcx1+Psx1

Y: Pcy+Psy= Pcy1+Psy1

 Calculation: Diagram: Pcx = mcvc Conclusion

Experiment Improvements:

The human errors can be reduced to a minimum if we use a type of a launcher that applies to equivalent strength to the puck which will allow the air puck to travel throughout the surface of the paper with uniform speed, the launch would also eliminate the excess y component and give us a more accurate result.  The surface of the paper can be improved with the use of paper with smoother surfaces; this would produce a better data paper for us to do measurements with. To eliminate the friction at the point of contact, we could use ring magnets with opposite poles around the pucks, this would eliminate the contact of the two pucks and ultimately take friction away. I think we could have done a combination of things better, if I were to design the lab again, I would create a apparatus with a camera mounted on top, which is programmed to take pictures for every time interval along with the improvements I have listed above, the pucks would be placed along the lines of a scale (Meter stick, measuring tape…etc.)  There will also be a spark timer for the physical data. This way we will have a physical and digital data, we can always look back at the digital data (digital data should be more accurate) and compare it with the physical data, this will make the experiment nearly perfect.

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

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related International Baccalaureate Physics essays

1. ## Physics Wave revision question

Calculate the angle between a refracted wavefront and the normal to the boundary. ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... (3) (ii) On the diagram above, construct three wavefronts to show the refraction of the wave at the boundary. (3) (Total 11 marks)

2. ## Suspension Bridges. this extended essay is an investigation to study the variation in tension ...

� 0.01 38.5 11 1.7821 � 0.03 17.6 1.1775 � 0.02 66.3 12.3 1.9340 � 0.03 19.5 1.2503 � 0.02 84.3 12.2 1.8447 � 0.04 19.2 1.1898 � 0.02 101 11.5 1.6092 � 0.02 17.5 1.0633 � 0.01 117 9.2 1.3181 � 0.02 14.4 0.8459 � 0.01 126 7.2 1.0349

1. ## Investigate the Strength of Straw.

37.9 38.2 5 38.8 38.5 38.9 Analysis of Data: Calculation for the Length of Stretched Straw: * First Trial: No.

2. ## Physics lab on propagation of errors. In this experiment I investigated the propagation ...

Thus V1 = 10 cm3 + 1 cm and V2= 9.525cm3 + 0.108cm. We use similar methods for calculating the volume of the cylindrical object. First, by calculating the amount of water held in the object (with the help of a measuring cylinder).

1. ## Determination of Coefficient of Friction

I collected these readings with a meter rule which smallest graduation was 0.1cm and therefore the absolute uncertainty of height measurements should be �0.05cm but I decided to take the absolute uncertainty as �0.3cm due to the fact that wooden plane was lifted by a human and therefore it was hard to identify the correct height.

2. ## Research question: Part A : What is the static friction coefficient of ...

In determining the kinetic coefficient, the acceleration of the block is needed and it is calculated from the dots marked on the ticker tape. 4. The coefficient is determined by using the formulae of. Results and calculation: Part A; e.g; surfaces : wood / wood Surfaces Vertical height, cm

1. ## Analyzing Uniform Circular Motion

However, this is also a source of error discussed later on in the experiment. Data Collection Raw Data Data Table #1: Manipulating Radius (r) Radius (�0.05 cm) Period for 10 rotations(�0.01s) Period for 1 rotation � 0.001 s 53.00 8.19 0.82 7.98 0.80 47.00 7.93 0.79 7.73 0.77 40.00 6.79

2. ## HL Physics Revision Notes

wave 3 at this angle, and wave 3 with 4 etc., across the whole grating. Hence if we look at the light through a telescope, that is bring it to a focus, then when the telescope makes an angle ? to the grating a bright fringe will be observed. • Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to 