Select the correct answer from each drop-down menu.
Balloon B is negatively charged.
A
В
B
Balloon A is
charged. If balloon A approaches balloon C, there'll be a force of
charged, and balloon C is
between them.

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.

Asmall grinding wheel has a moment of inertia of 4.0×10−5 kg⋅m2 . what net torque must be applied to the wheel for its angular acceleration to be 150 rad/s2 ?

Every winter i fly home to chicago. it takes 3 hours. what is my average speed?