作业帮The coordinate of an object is given as a function of time b
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The coordinate of an object is given as a function of time by x=4t^2-3t^3,where x is in meters(米) and t is in seconds.Its average acceleration over the interval from t=0 to t=2s is:
a)-4m/s^2
b)4m/s^2
c)-10m/s^2
d)10m/s^2
e)-13m/s^2
average acceleration=平均加速度
interval =间隔时间
a)-4m/s^2
b)4m/s^2
c)-10m/s^2
d)10m/s^2
e)-13m/s^2
average acceleration=平均加速度
interval =间隔时间
x=4t^2-3t^3
v=8t-9t^2
average acceleration
= (v(2)-v(0))/2
= (8*2-9*2*2)/2
= -10 meters/second^2
v=8t-9t^2
average acceleration
= (v(2)-v(0))/2
= (8*2-9*2*2)/2
= -10 meters/second^2
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