50 POINTS FOR WHOEVER ANSWERS THIS FIRST OPEN RESPONSE QUESTION Read all parts of the open-response question before you begin. Write your answers to the open-response questions in the space provided on your Student Response Sheet.

The brakes on a truck fail as it approaches a car stopped at a red light. Use Newton's first two laws of motion to explain what will happen when the truck collides with the car.

For reference:
1st law: An object will stay in place until it is pushed or pulled; an object that is moving will keep moving in a straight line until it is pushed or pulled to change its speed and/or direction.
2nd law: The more an object is pushed or pulled, the faster its speed and/or direction changes; the more massive an object is, the more resistance it has to change its speed and/or direction.

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

(1 point) match the differential equations and their vector valued function solutions. you may wish to multiply at least one solution out fully, to make sure that you know how to do it. you can get the other answers quickly by process of elimination and just multiply out one row element.

Which of the following compounds would be primarily ionic? methane, ch4, ammonia nh3, calcium chloride, cacl2, or carbon dioxide, co2