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rkw6

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1)A ball is thrown upward from the ground with an initial speed of 23.3 m/s; at the same instant, a ball is dropped from a building 13.4 m high. After how long will the balls be at the same height?

2)A model rocket is launched straight upward with an initial speed of 49.6 m/s. It accelerates with a constant upward acceleration of 2.01 m/s2 until its engines stop at an altitude of 170 m. What is the maximum height reached by the rocket?How long after lift off does the rocket reach its maximum height? How long is the rocket in the air?

3)A startled armadillo leaps upward rising 0.444 m in 0.230 s. What was its initial speed?What is its speed at this height?How much higher does it go?

4)A particle moves along the x-axis according to the equation

x = 47 t + 8t2

(where t is in seconds and x is in meters). Calculate the average velocity of the particle during the first 3.0 s of its motion.Calculate the instantaneous velocity of the particle at t = 3.0 s.Calculate the instantaneous acceleration of the particle at t = 3.0 s.

If anyone can help with ANY of these, it would be a huge help!