Ef157-m2-exambsolution-2014-p6 - University of Tennessee

EF 157 - Fall 2014

-

Exam 2 -Page

1) (15 pts) In the figure

I of 7

Section_ Name

atriSt" F is parallel to the slope

and the 68.0

lb force is horizontal.

a)

Determine the magnitude of the force F that would cause the

185 lb block to slide up the smooth slope (36.0o above

hoizontal) with an acceleratron of 1.2.6 N s2.

b)

Detennine the magnitude of the normal force acting on the

block in motion as described in part

?t

a).

'n0

.( t

_ c\ t

3b'/

/9r' b

n'At

,/

=\,/

\,/

Z G = {Yc\*

bg lL (os

,=2 /: ,

lGo

2-Fr: n/#

-G9

-

/

gs- lL

l),G,,ll la

-1t

=)

I

,/

i\

/

st:

f00f

$?16

6r lL

U

tt"

J

/:

=

(i!'+

,lt,s w,

( rc"u Qy'"\

z

l== t)6 ll(

o

---'--l

() cr

o

.-t^ 3 Q

0'.1 ,,

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