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  • 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 t

    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
    英語(yǔ)人氣:586 ℃時(shí)間:2020-05-14 08:28:58
    優(yōu)質(zhì)解答
    一只鳥以5.2m/s的速度垂直向上飛,在12.5m的高度丟了一個(gè)貝殼下來(lái)a.貝殼剛被丟下來(lái)的時(shí)候的加速度大小和方向b.貝殼到達(dá)的最高高度c.貝殼用多久落地d.貝殼落地時(shí)的速度a.就是重力加速度.9.81m/s^2,垂直向下b.貝殼被丟...
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