Experimental Design B/C

binary010101 · Post by **binary010101** » February 9th, 2010, 3:00 pm

Regression is basically plotting the points on your graph and saying "this fits this curve"

Deathshadow5 · Post by **Deathshadow5** » February 9th, 2010, 5:53 pm

My coach gave me a chunk of foam, a meter ruler, a spoon, some rubber bands, popsicle sticks, and tape. Im supposed to test the effects of gravity on a ping pong ball, a giant soft rubber bouncy ball, and a tennis ball. Im stuck and have no clue what to do (this is for practice) and im stuck, normally i can do the rest easil but on this...... im stumped (IM BETTER THAN THIS MAKES ME SOUND)

im with geek

penclspinner · Post by **penclspinner** » February 9th, 2010, 9:29 pm

Deathshadow5 wrote:My coach gave me a chunk of foam, a meter ruler, a spoon, some rubber bands, popsicle sticks, and tape. Im supposed to test the effects of gravity on a ping pong ball, a giant soft rubber bouncy ball, and a tennis ball. Im stuck and have no clue what to do (this is for practice) and im stuck, normally i can do the rest easil but on this...... im stumped

Shouldn't the effect of gravity be the same for all objects?

Post by **haven chuck** » February 10th, 2010, 8:24 am

penclspinner wrote:
Deathshadow5 wrote:My coach gave me a chunk of foam, a meter ruler, a spoon, some rubber bands, popsicle sticks, and tape. Im supposed to test the effects of gravity on a ping pong ball, a giant soft rubber bouncy ball, and a tennis ball. Im stuck and have no clue what to do (this is for practice) and im stuck, normally i can do the rest easil but on this...... im stumped
Shouldn't the effect of gravity be the same for all objects?

You can still test it, and then that can be your hypothesis

Post by **zyzzyva980** » February 10th, 2010, 9:59 am

Maybe something involving the foam?

duckiegirl2 · Post by **duckiegirl2** » February 10th, 2010, 11:16 am

You could bounce them all on the foam.

Post by **zyzzyva980** » February 10th, 2010, 4:38 pm

I was thinking along those lines, but you'd have to be extremely careful keeping everything the exact same. It's practically impossible.

Avis_de-Incendia · February 10th, 2010, 4:51 pm

Set it from a constant height, and drop it. =]

Is it a great achievement to achieve all checks on the score sheet minus 4?

Post by **zyzzyva980** » February 10th, 2010, 6:51 pm

Well, you have to drop it at the exact angle, with the same force, every time. Experimental errors? Yes. Is that a good thing? Not really.

Flavorflav · Post by **Flavorflav** » February 11th, 2010, 3:46 am

duckiegirl2 wrote:You could bounce them all on the foam.

Lots of variables in that - elasticity of the balls most importantly. You could just place them on the foam and measure the displacement of the foam.

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Experimental Design B/C

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