HELP PLS8. The graph shown represents the relationship between velocity and time for a 2.0-kilogram cart that is initially at rest and starts moving northward. In which direction is the cart that is shown
traveling at t=4 seconds?

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.