A 20 kg dog runs at + 2.5 m/s and collides with a 10 kg piece of on a frozen lake. After the collision we know that the 20 kg dog was moving - 2 m/s BACKWARDS, and the ice was moving the same way as the dog at - 5.0 m/s How fast AND in which direction was the piece of ice moving BEFORE the collision?

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?