Factors affecting friction
This research is on the magnitude of friction between surfaces that is important to a sport. You will need to identify which surfaces you want to investigate, and design your independent variables and dependent variables you want to measure. The report should contain a table and graph on how the friction changes with your independent variable.
First I think we should make a list of sports that satisfies the key points above then further break them down by considering those that we will be able to experiment/stimulate on. Does anyone have any ideas? :)
Audrey
Hi!
ReplyDeleteYour design is quite good - almost ready for approval. Good job!
A few areas you need to look into:
1. the plasticine ball makes contact with the surface with only a small area since it is roughly spherical. This also complicates your experiment since it is difficult to figure out and control this contact area exactly.
2. I don't see any relevance to any sport at this point (please see topic description)
3. the use of different materials further complicates your experiment. May I suggest sticking only to the mass (not weight?) of your object.
4. How exactly do you intend to measure the friction with the spring balance?
Once you have this fixed, you'll be ready to start!
BTW: I can give you something much more cool than a spring balance if you can get me your revised proposal soon.
Best of luck!
1. We've changed the plastincine ball to a wooden block so the contact area will be constant throughout the experiment.
ReplyDelete2. Im thinking maybe we can drag it across the netball court, the school track ? , any other suggestions?
3. Maybe we should remove the use of materials and stick to the differents "sports" related surfaces.
4. Mr Lau said that he would show us something, Mr Lau, i think that we are trying to measure the static friction not the dynamic friction as stactic friction is the frictional force that prevents two surfaces from sliding past each other
I'll be doing the revised proposal form tonight before submitting it tomorrow, with Dylan Tan and Hakim.
Also including the weight of the weights, to weigh the block down. Ad the weight of the object affects the frictional force.
ReplyDeleteOh yah, Mr Lau, is it possible to meet you tmrw about the project or would it be better to have it through this blog, since you have staff retreat tmrw?
ReplyDeleteWait, im still unsure about the sports surface part, cause we decided that we will use the netball court's surface for the experiment. Should we keep the surface constant or use different surfaces at the same time changing the weights.
ReplyDelete