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受欢迎的代数 >

solvefor v,e= 1/2mv^2+mgh

解答

求解

v, e = \frac{1}{2} \cdot m \cdot v^{2} + m \cdot g \cdot h

解答

v = \frac{2 e - 2 m g h}{m}, v = - \frac{2 e - 2 m g h}{m}; m \neq = 0

求解步骤

e = \frac{1}{2} m v^{2} + m g h

交换两边

\frac{1}{2} m v^{2} + m g h = e

将

m \cdot g \cdot h

到右边

\frac{1}{2} m v^{2} = e - m g h

在两边乘以

2

m v^{2} = 2 e - 2 m g h

两边除以

m; m \neq = 0

v^{2} = \frac{2 e - 2 m g h}{m}; m \neq = 0

对于

x^{2} = f (a)

解为

x = f (a), - f (a)

v = \frac{2 e - 2 m g h}{m}, v = - \frac{2 e - 2 m g h}{m}; m \neq = 0

作图

流行的例子

21 x^{2} = 4 - 5 x

19 x^{2} = 8 x

x^{2} - 2 x = 3 x + 6

completesquare x^2-3x-18=0

co m pl e t es q u a re x^{2} - 3 x - 18 = 0

2 x^{2} - x = 11