Conservation of Energy

Work

IB PhysicsJade BrownAmber Schwister

Pre-AP ChemistryBruno Chavez James LinterCodi Sturgeon

Pre-AP BiologyAudrey BaumanMorgan NaylorMary TolbertBethany Villalobos

Research Question:Does a change in work (ΔW) affect a subject’s temperature and mass?

Hypothesis:

As work increases, temperature will increase and mass will decrease.

Research Plan:Equipment-Treadmill, scale, stopwatch, metre stick, and two willing subjects

Procedure-1) Subject one’s resting temperature, height, and mass will be

recorded.2) Subject one will jog on a treadmill at inclination of x degrees for five

minutes.3) When five minutes have passed, Subject One’s temperature and

mass will again be measured, and recorded.4) Repeat the steps 1-3 with subject two.

Physics

The Physics students will analyze conservation of energy through work done on the system.

Work-Energy Principle Wnet= ½ mv2f-½ mv2

i

ΔKE=Wnet W=Fd

Chemistry

Chemistry students will analyze how the mass of both subjects change during the experiment and why.

Biology

Biology students will determine the reason behind the subject’s increase in temperature.

Subject #1 Codie

Subject #2 Audrey

Data- Codie (subject #1)Day 1 Before After

Temperature 35.7 C 36.9 C

Mass 56.172 kg 55.991 kg

Incline 0 degrees

Velocity 2.235 m/s

Time 300 s

Day 2 Before After

Temperature 35.8 C 37.9 C

Mass 56.81 kg 56.81 kg

Incline 8 degrees

Velocity 2.235 m/s

Time 300 s

Data- Audrey (subject #2)Day 1 Before After

Temperature 36.2 C 36.4 C

Mass 53.454 kg 53.0916 kg

Incline 0 degrees

Velocity .6705 m/s

Time 300s

Day 2 Before After

Temperature 36.4 C 36.6 C

Mass 54.36 kg 54.36 kg

Incline 8 degrees

Velocity 2.235 m/s

Time 300s

Change in Work

Using the Work-Energy Principle Wnet= ½ mv2

f-½ mv2i

the greatest amount of net work done was with the 0 degree inclination. The net work of the 8 degree inclination was 0 because mass stayed the same.

Temperature

The temperature of the two test subjects changed due to the amount of work used running one the incline. The homeostasis of the original temperature was modified therefore the temperature changed.

Mass

- Error in the scale- Loss of Water Weight

- If a subject has large quantities of sodium then that could explian why there was weight lost that quickly.

Conclusion

Are hypothesis was correct in saying as work increased so would temperature but we were incorrect in hypothesizing it would also decrease mass. We believe this is because of clinical error.

SourcesHow to Lose Water Weight Explained by Doctor at the Weight Loss Success. (n.d.). Retrieved May 21, 2015, from http://www.prweb.com/releases/how-to-lose-water-weight/explained-by-doctor/prweb10091919.htm