The function f,defined by f(t)=6+cos(t/40)+3sin(7t/40),is used to model the velocity of the plane,in miles per minute,for 0≤t≤40.According to thhis model,waht is the acceleration of the plane at t=23?What is the average velocity of the plane,in m
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![The function f,defined by f(t)=6+cos(t/40)+3sin(7t/40),is used to model the velocity of the plane,in miles per minute,for 0≤t≤40.According to thhis model,waht is the acceleration of the plane at t=23?What is the average velocity of the plane,in m](/uploads/image/z/12298486-22-6.jpg?t=The+function+f%2Cdefined+by+f%28t%29%3D6%2Bcos%28t%2F40%29%2B3sin%287t%2F40%29%2Cis+used+to+model+the+velocity+of+the+plane%2Cin+miles+per+minute%2Cfor+0%E2%89%A4t%E2%89%A440.According+to+thhis+model%2Cwaht+is+the+acceleration+of+the+plane+at+t%3D23%3FWhat+is+the+average+velocity+of+the+plane%2Cin+m)
The function f,defined by f(t)=6+cos(t/40)+3sin(7t/40),is used to model the velocity of the plane,in miles per minute,for 0≤t≤40.According to thhis model,waht is the acceleration of the plane at t=23?What is the average velocity of the plane,in m
The function f,defined by f(t)=6+cos(t/40)+3sin(7t/40),is used to model the velocity of the plane,in miles per minute,for 0≤t≤40.According to thhis model,waht is the acceleration of the plane at t=23?What is the average velocity of the plane,in miles per minute,over the time interval 0≤t≤40?
The function f,defined by f(t)=6+cos(t/40)+3sin(7t/40),is used to model the velocity of the plane,in miles per minute,for 0≤t≤40.According to thhis model,waht is the acceleration of the plane at t=23?What is the average velocity of the plane,in m
据定义,加速度就是速度对时间的微分,故加速度函数为
a(t)=f'(t)=-1/40*sin(t/40)+21/40*cos(7t/40),把t=23带入即得23分时的加速度
a=-0.347miles per minute^2
路程是速度对时间的积分,因此平均速度为
v1=1/40*∫(0→40)f(t)dt=(6t+40*sin(t/40)-120/7*cos(7t/40))|(40→0)=6.97miles per minute