In a billiards game, the cue ball of mass m travelling with velocity 2.8 m/s in the positive x-direction hits the stationary 9-ball also of mass m. after the collision, the 9-ball moves off at an angle of 30 degrees above the positive x-axis while the cue-ball moves off at an angle of 60 degrees below the positive x-axis. what speed does the cue ball have after the collision? a) 2.8 m/sb) 1.4 m/sc) 0.4 m/sd) 2.4 m/se) 0.7 m/s

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