There are two types of circuits: series and parallel. in a series circuit, the objects, wires and battery or power source are in a single loop and there is only one path for the electrons to take back to the battery. in a parallel circuit the objects are arranged so that there are several paths back to the battery. this diagram illustrates

How do we measure or think of speed in the united states?

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.

Four identical lab carts each have a mass of 200 kg. different masses are added to the carts and the velocities are measured. all carts move to the right.