We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

# Does The Mass of a Block of Wood Effect The Size of a Frictional Force? Essay Sample

The whole doc is available only for registered users OPEN DOC
• Pages:
• Word count: 972
• Category: physics

Get Access

## Does The Mass of a Block of Wood Effect The Size of a Frictional Force? Essay Sample

First we chose a block of wood, it weighed 105g. A Newton metre was attached, which would measures the frictional force exerted on the block when dragged across a surface.

We tried doing the experiment on a smooth surface (table top), but there wasn’t enough friction for an accurate reading. Also when we tried to measure the force with just the block and only a 50 g weight attached the Newton metre did not even give a reading as there was not enough friction on the surface. We then tried carrying out the experiment on a wooden surface (an old drawing board) but again the results weren’t very clear, due to lack of friction. Finally we carried out the experiment on the floor (anti-slip vinyl flooring), the results were much clearer as there was much more friction.

Results for preliminary experiment

Mass of block (g)

Extra mass placed on block (g)

Total Mass (g)

Force exerted on block on the smooth surface (N)

Force exerted on block on the wooden surface (N)

Force exerted on block on the rough surface (N)

105

50

155

0

0.1

0.2

105

100

205

0.1

0.3

0.4

Prediction

I predict that the mass of the block will have an effect on the amount of frictional force. My preliminary experiment results prove this as when we put more weight on the block the frictional force became greater. When the block is pushed down onto the surface of the floor, this causes the two surfaces to lock. A force is needed to push one surface over the other, this causes an equal and opposite reaction. This reaction is friction.

Therefore I think that when the mass of the block is increased the friction will increase as there will be more mass pushing down on the surface of the floor. I predict that the frictional force exerted on the block with different masses on top of the block will be directly proportional. This is because you can see from my preliminary experiment that the frictional force exerted on the block with a weight of 155g (mass of block 105g and additional weight 50g) has a force of 0.2N and then when we doubled the amount of additional weight to 100g, therefore making the total mass of the block 205g, the force doubled to 0.4N. I therefore predict that my results will be directly proportional

Method

We were given a block of wood, which weighed 105g; to the wood we attached a Newton metre, we pulled the Newton metre with the wooden block attached to it across an area of flooring. The Newton metre measured the force of friction and we recorded the results. We then added an additional weight of 50g to the block of wood and repeated the experiment. We did this again but added an 100g, 150g, 200g, 240g and a 300g weights and recorded all these results. I repeated this 3 times.

Controls

* Use the same surface throughout the experiment

* Keep the same person pulling the block

* Keep the speed at which you are pulling the block steady

* Use the same person to read the Newton metre each time

* Use the same Newton metre

* Use the same block

Diagram

Results

Total Mass of block (including extra weight) grams (g)

Attempt 1

Force of friction

N

Attempt 2

Force of friction

N

Attempt 3

Force of friction

N

Average frictional force

N

155

0.2

0.3

0.3

0.27

205

0.5

0.4

0.5

0.47

255

0.7

0.7

0.8

0.73

305

0.9

0.9

1.0

0.93

355

1.3

1.2

1.2

1.23

405

1.4

1.5

1.3

1.4

Analysis

Graph

I think this graph shows the results very well. I have drawn the line of best fit in with an arrow.

Conclusion

I think my experiment was a success. We can prove this by looking at the graph. The line of best fit passes through nearly all of points, proving that my results are proportional.

In my prediction I said that when the mass of the block is increased the friction will increase as there will be more mass pushing down on the surface of the floor. I predicted that the frictional force exerted on the block with different masses on top of the block will be directly proportional. I think that I have predicted correctly as my results were nearly directly proportional. Also we can see from my results that the friction increased when more mass was added to the block.

Evaluation

We can see from this graph that my results were proportional and that there are not any obvious anomalies. We can see from the arrow I have drawn on the graph that my results are not completely directly proportional. This is because the line does not go through the origin. It is very close though, so I think that my experiment was very accurate. From the line of best fit I have drawn, we can see that there is 1 small anomalie. I have worked out however that it is only 3% away from the line.

I think that my results were more accurate as I repeated the experiment 3 times, and then I averaged my results. This therefore made my results more accurate. We can see that my results are accurate from looking at the graph.

We can write a custom essay

Order an essay

## You May Also Find These Documents Helpful

Freely falling body definition

Objective: To measure the acceleration of a freely falling body (g) fairly precisely using a Picket Fence and Photogate. Materials: LabQuest, LabQuest App, Picket Fence, Vernier Photogate, clamp or ring stand. Procedure The Photogate was fastened rigidly to a ring stand so the arms could extend horizontally, and so that the entire length of the Picket Fence was able to fall freely through the Photogate. A soft -...

Finding the Specific Heat of a Metal...

Finding the Specific Heat of a Metal Problem Determine the specific heat of at least two different metals. Compare your results with the accepted values of these metals, which you can find online Background The specific heat capacity of a material is defined as the heat required to raise a unit mass (1 gram) of the substance by a fixed temperature (1 C). This is...

The Relationship Between the Input and Output...

I have chosen the light dependent resistor (LDR) as the sensor to be used in this practical. I have never used this sensor before but from research I know that the LDR works by changing its resistance as the ambient illumination changes. They are made from cadmium sulphide (CdS). An LDR (the sensor part) How it Works Cadmium Sulphide cells rely on the material's ability...

Physics Investigation

I am trying to find out about: The factors affecting the deflection of a cantilever when weights are added onto the end. What I think will happen: I think that as the weights are added to the cantilever, the deflection will increase. I think this will happen because: I think the deflection will increase because gravity will push down on the cantilever and weights while...

The Physics of Windsurfing

You glide across the surface of the water at unbelievable speeds, steer towards a white capped wave, and then lift off like a bird, each muscle resisting against the force of the wind. Then you smash into the trough of the wave, leap up from near disaster, and look quickly for the next wave so you can do it all over again. This is the...

### Essays 57,092

300+
Materials Daily
100,000+ Subjects
2000+ Topics
Free Plagiarism
Checker
All Materials
are Cataloged Well

Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email.

Sorry, but only registered users have full access

immediately?

Become a member

Thank You A Lot!

Emma Taylor

online

Hi there!
Would you like to get such a paper?
How about getting a customized one?

Can't find What you were Looking for?