Procedure:
In this lab, we use electrical meters to calculate our average home's power usage
Question:
1.If you ran up the ramp in half the time of another student of equal weight you did the same work but used twice the power. Explain. This is because p=w/t. The smaller number "t" is the bigger number power is.
2. If the height were reduced by half, the work would be less but the power would be the same
3.Greater power is not necessary, it uses the same amount of power.
4. 66 gallons
5. .134 hp for the light bulb. 150 kW for the engine
Friday, November 8, 2013
Hooke's Law
Procedure:
In this lab we demonstrated the Elastic Limits of Springs and Hooke's Law by adding weights to a string and letting gravity stretch it out. Based on how far it stretched and the actual length of the spring, we were able to calculate the spring constant of the spring.
Questions:
1. Things that may have causes errors in our results was that we couldn't measure the exact changes in spring stretch because sometimes it was a really small change and we didn't have the means of measuring something so small
2. More precision can be added to this apparatus by containing the spring a tube so it can not sway or move when adding weights to it.
3.If you overstretch a spring or rubber band it can either break about and/or it will never return to the shape it once was. It would affect our result because the length of the actual spring without any tension would be longer than normal
4. It looked like a linear graph and the slope represents tension being put on f the spring
5. The minus sign means the force is opposite of the displacement. Meaning if you compress the spring, the spring pushes back at your and vice versa
6. No rubber bands do not obey Hooke's law
7. Most physical factors contribute to the spring constant, i.e. material, weight, mass, length etc.
In this lab we demonstrated the Elastic Limits of Springs and Hooke's Law by adding weights to a string and letting gravity stretch it out. Based on how far it stretched and the actual length of the spring, we were able to calculate the spring constant of the spring.
Questions:
1. Things that may have causes errors in our results was that we couldn't measure the exact changes in spring stretch because sometimes it was a really small change and we didn't have the means of measuring something so small
2. More precision can be added to this apparatus by containing the spring a tube so it can not sway or move when adding weights to it.
3.If you overstretch a spring or rubber band it can either break about and/or it will never return to the shape it once was. It would affect our result because the length of the actual spring without any tension would be longer than normal
4. It looked like a linear graph and the slope represents tension being put on f the spring
5. The minus sign means the force is opposite of the displacement. Meaning if you compress the spring, the spring pushes back at your and vice versa
6. No rubber bands do not obey Hooke's law
7. Most physical factors contribute to the spring constant, i.e. material, weight, mass, length etc.
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