What is the kinetic energy of an object that has a mass of 30kg and moves with a velocity of 20 m/s?
a. 6,000j
b. 12,000j
c. 5,880j
d. 2,940j

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2