In another solar system is planet Driff, which has 5 times the mass of the earth and also 5 times the radius.
How does the gravitational acceleration on the surface of Driff compare to the gravitational acceleration on the surface of the earth?
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Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.

Which of the following is not an appropriate unit for acceleration? (kg/12 mihr? m/min/sec cm/30c?