积分两次就好了
a(t)=100-4t^2
加速度对时间积分,初速为零,得速度:v(t)=100t-(4/3)t^3
速度对时间积分,初始位移为零,得位移:x(t)=50t^2-(1/3)t^4
前五秒位移:x(5)-x(0) = 50×5^2-(5^4)/3 = 3125/3 =1041.667
积分两次就好了
a(t)=100-4t^2
加速度对时间积分,初速为零,得速度:v(t)=100t-(4/3)t^3
速度对时间积分,初始位移为零,得位移:x(t)=50t^2-(1/3)t^4
前五秒位移:x(5)-x(0) = 50×5^2-(5^4)/3 = 3125/3 =1041.667