1. A golfer strikes a golf ball on level ground. The ball leaves the ground with an initial velocity of 25 m/s [30 0 above the horizontal]. If air resistance is negligible, determine the ball's (a) horizontal range (a_ssg13i_1_1g_t_;l_1at it lands at the same level om which it started) (b) maximum height (0) horizontal displacement when it is 5 m above the ground 2. A plane is travelling with an air speed of 280 km/h=L45 S of E]. A wind is blowing at 70 km/h [3 0 E of N] relative to the ground. Determine the velocity of the plane relative to the ground. 3. Two books are resting side by side, in contact, on a desk. A 0.5 N horizontal force causes the books to move together with an acceleration of 0.2 m/s 2 horizontally. The mass of the book to which the force is applied directly is 1.2 kg. Neglecting friction, determine a) the mass of the other books. b) the magnitude of the force exerted by one book on the other. 4. A 250 g mass at the end of a 1.5m string travels at 4.2 m/s in a vertical circle. Draw a Free-Body-Diagram for each part of the following and calculate: a) The tension of the string at the top of the circle b) The tension in the string at the bottom of the circle. c) The minimum speed required to maintain the circular path. (1) Describe what happens if the string is cut at the top of the circle and why