please explain each question with the solution. PHY 166 Sample Exam I To receive full credit, all work must be shown. 1. An arrow is shot straight upward into the air and reaches a maximum height above the launch point of 30m. (a) What was its initial velocity? (b) How long does it take to reach the maximum height? (c) How long does it take to get back to the staring point? 2. A golf ball is struck with a five iron on level ground. It lands 90.0 meters away 4.20 seconds later. (a) What was the magnitude and direction of the initial velocity? (b) What is the maximum height it attains above the ground? 3. An object acted upon by three forces moves at a constant velocity. A force of 6.5 N acts in the positive x direction and a second of magnitude 4.4 N acts in the negative y direction. Find the magnitude and direction of the third force acting on the object. 4. An Atwood machine has masses of 3.1 kg and 4.4 kg. What is the acceleration of the masses and what is the tension in the string connecting the masses? 5. An 18 kg block accelerates at 0.27 m/s' down a 37 incline. (a) Find the friction force impeding its motion. (b) Obtain the coefficient of kinetic friction