A 996 kg car is travelling at a velocity of 15.4 m/s. How much work must be done on the car by the brakes to stop the car. Include the correct sign. Neglect friction except in the braking system.

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.