A150 kg roller coaster has a dip in it with a radius of 30 m. if a carriage is travelling through the dip at 20 m/s then find the normal reaction of the rails on the carriage.

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.