How much work is done by the motor in a cd player to make a cd spin, starting from rest? the cd has a diameter of 12.0 cm and a mass of 15.8 g. the laser scans at a constant tangential velocity of 1.20 m/s. assume that the music is first detected at a radius of 27.0 mm from the center of the disk. ignore the small circular hole at the cd’s center.

probably not if net force is zero

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

it is a negative acceleration