Stereothe

Page 1

.4

.

x dx u dt du acm dt F m F

F

I I

m

P ewton

d dt d dt

m u

F

dP dt

0,

P

L I

.

.

W

=f(t) =f(t) =f(t)

.

1 2

K

1

1

m u2 2 2

.

W=

m u2

1

L=

0,

W=F x K

ewton

dL dt

m u2 1 2

W

2

1 2 I

I

2

2 2

1

x=ut t 1 2 x=x0+u0t ± t 2 t =u0 CM S =uo2/2

2

I

2 1

=f(t)

t

u=u0

0t

0

t

=f(t)

·t

0

±

.

1 2

t2

=f(t)

0/ 2 o /2

1


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