What happens to the force between the objects if Mass 2 decreases? (increases, decreases affected)

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

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.

Current from a charged capacitor lights a bulb. as time goes on the brightness of the