Two object accumulated a charge of 4.5 μc and another a charge of 2. 8 μc. these two objects are separated by a distance of 2.5 cm. calculate the magnitude of the electric force between these two objects.

181 .24 n

4.53 n

1.81 x 1014 n

2.02 x 10-8 n

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

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.

What is a subatomic particle with a negative charge and very little mass?