Two masses of 12.00 kilograms and 7.50 kilograms, respectively, are connected to a pulley, as shown in the diagram at right. Initially, the 7.50 kilogram mass is held on the ground, but once released, the weight of the 12.00 kilogram mass causes the pulley to spin counterclockwise. Determine the speed of the 7.50 kilogram mass the moment the 12.00 kilogram mass hits the floor if it begins 3.00 meters above the floor.

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.