... used to eliminate t in favor of y This result, which will be seen in the chapter dealing with conservation of energy (Chapter 7), is valid for any y, positive, negative or zero, as long as v ... y y0 45 m, t ? y y v0 y t a y t gives t 3 .03 s During this time the rock travels horizontally x x0 v0 xt (49 m/s)(3 .03 s) 150 m The rock lands 50 m past the foot of the dam ... (3.29), v 2TR 196 m/s b) From either Eq (3.30) or Eq (3.31), arad 1.13 104 m/s 1.15 103 g 3.31: Solving Eq (3.30) for T in terms of R and arad , a) 4 (7.0 m)/(3.0)(9.80 m/s2 ) 3.07...