7. What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second? 9 J

58.8 J

6 J

3 J

What is the function of the commutator in a dc motor? a. to spin the magnet b. to change direct current into alternating current c. to change alternating current into direct current d. to spin the wire coil

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude