Notice that the stopwatch is set to zero. Advance the video to this point and reset the stopwatch. Then advance the video until the roller coaster train has moved the distance equal to the length of the train car. What time does the stopwatch show now

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.