问题描述：
A glaucous-winged gull,ascending straight upward at 5.20m/s,drops a shell when it is 12.5m above the ground.a) What is the magnitude and direction of the shell's acceleration just after it is released?b) Find the maximum height above the ground reached by the shell.c) How long does it take for the shell to reach the ground?d) What is the speed of the shell at this time?
a) 9.81m/s^2
b) 13.9m
C) 2.21s
d) 16.5m/s
a) 9.81m/s^2
b) 13.9m
C) 2.21s
d) 16.5m/s
问题解答：
我来补答展开全文阅读