p11 053

background image

53. We use τ = F r = , where α satisfies θ =

1
2

αt

2

(Eq. 11-13). Here θ = 90

=

π

2

rad and t = 30 s. The

force needed is consequently

F =

r

=

I



2θ/t

2



r

=

(8.7

× 10

4

)



2(π/2)/30

2



2.4

= 1.3

× 10

2

N .


Document Outline


Wyszukiwarka

Podobne podstrony:
p11 015
p11 086
p11 083
P23 053
p11 046
Planowanie systemow projekt 053 Nieznany
p11 076
p11 058
p11 048
p11 093
03 2005 053 054
p11 017
p11 049
p11 100
p11 022
p11 066
p11 044

więcej podobnych podstron