Ormh rythmos

Page 1

2kg (

45cm,

).

, . :

i)

.

ii)

(

).

g=10m/s2. :

, i)

1

.

2

,

, ( =0).

:

PB t

F (

2

Fx= m

)

1=0,

R

,

PB t

w :

PB t

mg

20kgm / s 2

ii)

, ,

,

,

. ,

,

:

+U 0+mg =

A

2g

+U 1 m 2

2 A

0

2 10 0,45m / s ,

3m / s :

1


=m =2kg路3m/s= 6kg路m/s. ,

FR

FR

2

m

32 N 0,45

2 A

R

40 N

, ,

, :

P t

40kg m / s 2 .

P t

P

2


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