Kinematics of Particles 300 m 11.45 Two rockets are launched at a fireworks display. Rocket A is launched with an initial velocity to 100 m/s and rocket B is launched t, s later with the same initial velocity. The two rockets are timed to explode simultaneously at a height of 300 m as A is falling and B is rising. Assuming a constant acceleration g 9.81 m/s, determine (a) the time t₁, (b) the velocity of B relative to A at the time of the explosion. 11.46 Car A is parked along the northbound lane of a highway, and car B is traveling in the southbound lane at a constant speed of 90 km/h. At t=0, A starts and accelerates at a constant rate a, while at t 5 s, B begins to slow down with a constant deceleration of magnitude a,/6. Knowing that when the cars pass each other x 90 m and g., determine (a) the acceleration a. (b) when the vehicles pass each other, (c) the distance d between the vehicles at t = 0. = Fig. P11.45