2. On a train, a freight car of mass 20,000 kg moves along a frictionless level railroad track with a constant velocity of 15 m/s. When it comes to a stop in 3.0 seconds, what is the force required to stop the freight car?

Sasha has just gotten a new job in a nearby city. after comparison shopping, she found that renting a nice two-bedroom apartment would cost around $800 per month. her utilities would cost about $150 per month. sasha has enough money saved for a down payment, and she found that she can buy a three-bedroom house or condo with a mortgage payment of $1,000 per month, including taxes and homeowner's insurance. her utilities would cost about $200 per month. what is the advantage of buying the house over renting the apartment?