Unformatted text preview: the time t when y = 45 m. Since the initial velocity of the key is zero, the coordinate of the key is given by y = 1 2 gt 2 . Thus t = r 2 y g = s 2(45 m) 9 . 8 m / s 2 = 3 . 03 s . Therefore, the speed of the boat is v b = 12 m 3 . 03 s = 4 . 0 m / s ....
View
Full Document
 initial velocity, downward direction

Click to edit the document details