Homework 9 for quiz 9 on 3/12/03

Young and Freedman

12-10 (ans: Force towards larger mass with magnitude $4Gm(m_2-m_1)/d^2)$.)

12-14 (ans: (a) $8.87 m/s^2$, (b) $44.3N$.)

12-26 (ans: $2.1 \times 10^{10} m$.)

12-40 (ans: (a) $9.67\times 10^{-12} N$, (b) $3.02 \times 10^{-5} m/s$.)

12-56 (ans: (a) $\approx GmM_E/(2R_E)$, (b) $GmM_E/(2R_E)$.)

12-62 (ans: (c) $M_\alpha = 7.80\times 10^{29} kg$, $M_\beta = 2.34\times 10^{30} kg$, (d) $R_{star} = 1.9\times 10^9 m$, $v_{star} = 4.4 \times 10^2 km/s$ $R_{black~hole} = 34\times 10^8 m$, $v_{black~hole} = 77 km/s$.)

Solve the following problems from the U Oregon website and compare with the solutions that are also given there.

Everyday gravitational attraction

Estimating the mass of the sun

Putting a satellite in geostationary orbit

Calculating the distance between the Moon and the Earth.

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