27) You are arguing over a cell phone while trailing an unmarked police car by 25 m; both your car and the police car are traveling at 110 km/h. Your argument diverts your attention from the police car for 2.0 s (long enough for you to look at the phone and yell, "I won't do that!"). At the beginning of that 2.0 s, the police officer begins braking suddenly at 5.0 m/s-. (a) What is the separation between the two cars when your attention finally returns? Suppose that you take another 0.40 s to realize your danger and begin braking. (b) If you too brake at 5.0 m/'s, what is your speed when you hit the police car? 28) The position r of a particle moving in an xy plane is given by + = (2.00t - 5.00t)i + (6.00 - 7.00t*)j , with r in meters and t is seconds. In unit-vector notation, calculate (a) r, (b) v. and (c) a fort = 2.00 s (d). What is the angle between the positive direction of the x axis and a line tangent to the particle's path at t = 2.00 s? 29) A soccer ball is kicked from the ground with an initial speed of 19.5 m's at an upward angle of 450. A player 55 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before it hits the ground