How much force was required to slow the car down to 2 m/s^2 if the mass of the car is 8000kg?

Suppose you are navigating a spacecraft far from other objects. The mass of the spacecraft is 4.0  104 kg (about 40 tons). The rocket engines are shut off, and you're coasting along with a constant velocity of ‹ 0, 30, 0 › km/s. As you pass the location ‹ 6, 9, 0 › km you briefly fire side thruster rockets, so that your spacecraft experiences a net force of ‹ 5.0  105, 0, 0 › N for 20 s. The ejected gases have a mass that is small compared to the mass of the spacecraft. You then continue coasting with the rocket engines turned off. Where are you an hour later? (Think about what approximations or simplifying assumptions you made in your analysis. Also think about the choice of system: what are the surroundings that exert external forces on your system?)f =         m

The 2022 Chevy Corvette has a mass of 1600 kg. If it were travelling at 31 m/s in the positive direction and a constant, negative, net stopping force of 17,000 N were applied to it, what distance would it travel before coming to rest?

(a) Find the speed at which Superman (mass=90.0 kg) must fly into a train (mass = 17485 kg) traveling at 65.0 km/hr to stop it. Running into the train at that speed would severely damage both train and passengers. (b) Calculate the minimum time Superman must take to stop the train if the passengers experience an average horizontal force of 0.410 their own weight. (c) How far does the train then travel while being slowed to a stop?