# Posts by ucieng

Total # Posts: 11

**physics**

Compute the moment of inertia of your body as you stand tall and turn around a vertical axis passing through the top of your head and the point halfway between your ankles. Model your body as a cylinder of mass 59.5 kg and circumference 84.5 cm. I got the answer to be 10.6 by ...

*February 18, 2010*

**physics**

The vector position of a 3.80 g particle moving in the xy plane varies in time according to the following equation. r1=(3i+3j)t+2jt^2 At the same time, the vector position of a 5.35 g particle varies according to the following equation. r2=3i-2it^2-6jt For each equation, t is ...

*February 13, 2010*

**Physics**

The vector position of a 3.80 g particle moving in the xy plane varies in time according to the following equation. r1=(3i+3j)t+2jt^2 At the same time, the vector position of a 5.35 g particle varies according to the following equation. r2=3i-2it^2-6jt For each equation, t is ...

*February 12, 2010*

**Physics**

Thanks so much for your help drwls!

*February 6, 2010*

**Physics**

A single conservative force acts on a 5.00 kg particle. The equation Fx = (2x + 4) N describes this force, where x is in meters. As the particle moves along the x axis from x = 1.40 m to x = 5.80 m, calculate the following. (a) the work done by this force on the particle (b) ...

*February 6, 2010*

**Physics**

Estimate the terminal speed of a wooden sphere (density 0.770 g/cm3) falling through air, if its radius is 9.00 cm and its drag coefficient is 0.500. (The density of air is 1.20 kg/m3.) (b) From what height would a freely falling object reach this speed in the absence of air ...

*January 24, 2010*

**Physics**

Estimate the terminal speed of a wooden sphere (density 0.770 g/cm3) falling through air, if its radius is 9.00 cm and its drag coefficient is 0.500. (The density of air is 1.20 kg/m3.) (b) From what height would a freely falling object reach this speed in the absence of air ...

*January 24, 2010*

**Physics: fictitious forces**

A plumb bob does not hang exactly along a line directed to the center of the Earth's rotation. How much does the plumb bob deviate from a radial line at 39.0° north latitude? Assume that the Earth is spherical. This was in my textbook with an angle of 35 instead of 39 ...

*January 24, 2010*

**Physics**

Thanks so much for your help drwls!!

*January 17, 2010*

**Physics**

An iron bolt of mass 80.0 g hangs from a string 38.8 cm long. The top end of the string is fixed. Without touching it, a magnet attracts the bolt so that it remains stationary, displaced horizontally 28.0 cm to the right from the previously vertical line of the string. (a) ...

*January 17, 2010*

**Physics**

An iron bolt of mass 80.0 g hangs from a string 38.8 cm long. The top end of the string is fixed. Without touching it, a magnet attracts the bolt so that it remains stationary, displaced horizontally 28.0 cm to the right from the previously vertical line of the string. (a) ...

*January 17, 2010*

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