You hold a cord/rope with length l, mass m and density p in such a way that it just touches a scale/balance (don't forget that l = mp). then, you release the rope. calculate the weight that you can read on the display of the balance when the last piece of the cord/rope touches it.

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.