Question

Question 2 1 pts Kirk, Spock, and McCoy stand on the top deck of a parking garage on planet Earth, 19 m above the ground below. For reasons that are unknown to us, they simultaneously throw pebbles off the deck, each at the same speed of 15 m/s. Kirk throws his up at an angle of 45 degrees above the horizontal, Spock throws his perfectly horizontally, and McCoy, in a fit of pique, throws his straight down toward the ground. How long does it take McCoy's stone to hit the ground?

Answer 1

M For McCoy : t- Displacem Displacement of Mc Coy's Stone is 19m downward. 6.15m/ a=g Using! 19m S=1&t + 1 at 2 -19 = -15(+) + (-9.8) +² - 19=15t + 4.9 t² =) 4.9 +² +15t-19=0 solving the quadratic gives: - t = 0.963 s