1, In a game war, one team sets base on a cliff 15m high and 60m away from the opponent's base. At what velocity must the attack be launched so that the lower base will be hit? The initial launch is at 20 degrees below the horizontal? 2. A baseball is hit at a velocity of 100fps at an angle 20 above the horizontal. Will the ball hit a fence 20ff high and 200ft away from the batter's plate? How far will the ball land from the fence? 3. A boulder rolls over a 50m high cliff. How fast was the boulder moving if it was found 180 m on the ground? At what time did the boulder hit the ground? At what velocity was it approaching the ground? 9 4. Graph the trajectory of a particle for every 1 sec, if it is moving at an initial velocity of 25 m/s from a height of 20 m, if (a) it is launched horizontally, (b) it is launched 15 above the horizontal, and (c) it is launched 10 below the horizontal. Mark the highest point it reaches, and its maximum horizontal displacements