7. (5 marks) The Science Department has just received a shipment of new Physics textbooks. The textbooks have been shipped in a cardboard box with a mass of 5 kg. The coefficient of kinetic friction between the floor and the box is JK=0.35. Find the force that must be applied to cause the box to move at a constant velocity. Be sure to include a free-body diagram showing all of the forces acting on the box.6. {8 marks) Solve the following circuit for all values cf resistance, current, and voage. 10. (6 marks) While driving on the 401 you see a traffic jam ahead. Not wanting to apply the brake, you take your foot off the gas and let the car slow down on its own. Your acceleration is -4.0 m/s2 (remember you are slowing down) and the mass of the car is 1200 kg. a ) How much frictional force acted to slow down the car? b ) While slowing down, the car travels 85 m in 3.2 s. What was your initial velocity? C) What was your final velocity?3. (4 marks) In an effort to determine the temperature, Priya blows a whistle and hears the echo 0.64 5 later. She knows that the wall factory wall that he sound reected off is 110.0 m away. a) What is the speed of the sound? b) What it the temperature