Question

Previous Answers SerPSE10 4.3.OP.017. RMy Notes + Ask Your Teacher (a) A soccer player kicks a rock horizontally off a 31 m high cliff into a pool of water. If the player hears the sound of the splash 2.67 s later, what was the initial speed given to the rock (in m/s)? Assume the speed of sound in air is 343 m/s. 16.29 You appear to have correctly calculated the distance the rock travels, but you have then used the wrong time to calculate the horizontal speed. m/s (b) What If? If the temperature near the cliff suddenly falls to 0°C, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 2.67 s after kicking the rock? m/s

Hello I have this problem as ive tried it and I got the wrong answer for the first part, so I cant do the second, please help me with this question

Answer 1

sol is facing in y-anis consider the road s=ut that sub and values tor to solve t 31 = 0+1 19.8) to ti= 2.523 Time plages taken by sound to reach Sho4, ta t-ti Meet 2.67 -2.52 _ _ 20'is sec Distance ploger betwen . splash and store at s vka (343) (0.157 = 51.45

Horizont of distance = 151.45²_312. le goilte : initial is speed of rock u = 41.06 2.523 = 16. 275mts ---331 (1) Distance covered by sound = 12 13 x 0.15 = $1.45 49.65 ------)_12_549-65-31 38.78 Va = 38.78 84- 15.39 mis =