PRAC SUGGESTIONS !

[kaiipoo_]

Its a design-your-own prac on structures and materials !

thanx

[Alwin]

Its a design-your-own prac on structures and materials !

thanx

You have a design you own prac for structures and materials?! We just tested the strength of snakes (the lollies) haha

I suggest: Build a bridge... and get over it

Jks mate, you can just test material like we did by measuring strength, strain and stress by hanging different masses from it. If you do choose to test snakes from different companies, make sure you wash off any duct tape before eating ur sample afterwards (just from personal experience)

[Conic]

I did the same thing with fishing line. If you're going for a test where you attach weights to a material to measure the stress, strain etc it's better to pick a material with a lower Young's modulus since it's easier to measure the change in length.

[kaiipoo_]

yep and its a sac. it's pretty sick. HAHA

testing snakes sounds creative and original ! but im afraid my teacher would just question what kind of purpose it achieves

[kaiipoo_]

Any others?

[Lasercookie]

testing snakes sounds creative and original ! but im afraid my teacher would just question what kind of purpose it achieves

But that's the best kind of prac though A combination of rubber bands and projectile motion could also end up being a fun prac (you'd want to focus on the stress/strain/whatever properties of the rubber bands though). For both of those you could justify it by looking at the relevant laws/results that your textbook talks about (stress, strain, young's modulus?) and verifying if they're true I guess.

Just taking a look at the study design, looks like you cover translational forces and torques in this detailed study too. Stuff that spins around is always fun. Maybe a prac based on the art of spinning on desk chairs. To make it more interesting you could look at combining translation and rotation (moving and spinning around the room on a desk chair) - maybe. You'd want to be measuring your angular velocity (stopwatch and count how many times you make a full revolution in some amount of time) and then maybe change some variables around and see what happens.

Ideally you'd like to spin faster because that's more fun, what do you have to do to that? (make the radius you're covering smaller, right?) You could try to figure out what gives you the best balance between a nice fast angular velocity, cover the largest distance and actually being able to overcome friction and other things to spin for long enough too.

Or something along the lines of that anyway. You could also calculate the rotational energy (approximate the chair + you as a cylinder, perhaps). That way you could frame the prac around discovering what you personally could end up powering if you spun around a desk chair (well you'd be making a lot of assumptions and approximations along the way, but it's amusing in a sense to think about). You should be able to find a list of things with how much energy they use up somewhere. That might be pushing a bit off the study design, but with the cylinder approximation the calculations won't be that hard and would use the data you'd be measuring anyway (angular velocity).

Study design also mentions static equilibrium problems. Maybe something to do with a jenga game, and analysing the forces there? Not too sure, you might be able to expand on the idea and see if you can get something meaningful out of it.

You should definitely use the opportunity as an excuse to do something fun though.