A physics student pulls a 100.0 kg chunk of stone with constant velocity of 0.50 m/a on a horizontal surface with a horizontal force of Fa=200.0N. If the rope breaks, how long does it take for the stone to come to rest

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

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?

Consider an air-filled charged capacitor. how can its capacitance be increased?