a Homework 3 Begin Date: 1/15/202412.00.00 (6%) Problem 11: A rock takes 2.8 s to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.2 m/s. tatus or W leted leted eted eted eted eted ted ted 50% Part (a) Calculate the height of the cliff in m. h=15.456 h = 15.46 Correct! 50% Part (b) How long would it take to reach the ground if it is thrown straight down with the same speed? sin cos( tan TE (D) 7 00 cotan() asin() acos E 14 9 HOME 5 6 atan acotan sinh 1 2 3 cosh() tanh() cotanh + 0 END Degrees O Radians NO BACKSPACE DEL CLEAR Submit Hint Feedback I give up! Hints: 1 for a 0% deduction. Hints remaining: 0 -Use the result of part (a) for the final position of the rock. Be careful with the signs, and refer to the chosen system of coordinates. Feedback: 0% deduction per feedback. G CDP S A (