1.An eagle is flying due east at 8.9m/s carrying a gopher in
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1.An eagle is flying due east at 8.9m/s carrying a gopher in its talons.The gopher manages to break free at a height of 12m.What is the magnitude of the gopher's velocity as it reaches the ground?Note:effects of air resistance are not included in this calculation.
a)22m/d
b)18m/s
c)11m/s
d)9.8m/s
e)8.9m/s
a)22m/d
b)18m/s
c)11m/s
d)9.8m/s
e)8.9m/s
![1.An eagle is flying due east at 8.9m/s carrying a gopher in](/uploads/image/z/3817805-5-5.jpg?t=1.An+eagle+is+flying+due+east+at+8.9m%2Fs+carrying+a+gopher+in)
题目大意:一只鹰抓着一只地鼠以8.9m/s的速度往东飞.这只地鼠在离地面12m的地方挣脱了.问它落地时的速度是多大?注:不考虑空气阻力
要算落地时的合速度,g取10
水平方向分速度始终为8.9m/s
竖直方向分速度:gt*t/2=12
t=1.55s
竖直方向分速度就等于gt=15.5m/s
再算和速度约等于18
选
要算落地时的合速度,g取10
水平方向分速度始终为8.9m/s
竖直方向分速度:gt*t/2=12
t=1.55s
竖直方向分速度就等于gt=15.5m/s
再算和速度约等于18
选
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