Solutions split up by class.

There are 4 pages of solutions for each class (8am or 12pm).

12.19 (12.20)
12.22 (12.23)
12.24 (12.25)
12.29 (12.30)
12.27 (12.28)
12.37 (12.39)
12.41 (12.43)
12.43 (12.45)
12.49 (12.51)
12.63 (12.65)
13.16 (13.16)
13.17 (13.17)
13.24 (13.24)
13.29 (13.29)
13.32 (13.32)
13.36 (13.34)
13.37 (13.37)
13.40 (13.40)
13.56 (13.54)
13.62 (13.59)

13.42
The human eye and muscles that hold it can be modeled as a mass-spring system with typical values m= 7.6 g and k= 2.6 kN/m. What's the resonant frequency of this system? Shaking your head at this frequency blurs vision, as the eyeball undergoes resonant oscillations.

13.47

HW #4
9.12 (9.12)
9.20 (9.21)
9.21 (9.23)
9.24
High-speed photos of a 220 microgram flea jumping vertically show that the jump lasts 1.4 milliseconds and involves an average vertical acceleration of 110g. (a) What average force does the ground exert on the flea during its jump? (b) What impulse does the ground exert on the flea during its jump?

9.29 (9.29)
9.31 (9.31)
9.36

Edition 2 (Edition 1)

6.15 (6.16)

6.24 (new)
Spider silk is a remarkable elastic material. A particular strand has spring constant 70 mN/m, and it stretches 9.5 cm when a fly hits it. How much work did the fly's impact do on the silk strand?

6.27 (6.28)

6.31(6.33)

6.36 (6.38)

6.43
You're at the gym, doing arm raises. With each rep, you lift a 18 N weight 56 cm. How many raises must you do before you've expended 200 kcal of work? If your workout takes 6.0 min, what's your average power output?

6.61 (6.62)

6.71 (6.70)

6.81 (6.81)

7.10 (7.11)

7.15 (7.17)

Here you can ask general physics questions. Prof Carter or the TAs will try their best to answer in a timely manner.

Here you'll find homework and other relevant class stuffs.