Problem 2-35 Threeforcesact on the bracket.Determinethe magnitudeand direction dof F, so that the resultant forceis directedalongthe positive_r'axisand hasa magnitude Fo. of
UnitsUsed: tN:to3N
Given:
Fn=lkN Fz=450N F;=ZOON
a=45deg
\"r'
f=30deg Solution:
+

Physics 170 Quiz 1A, Sept. 9, 2014 Solutions
Closed book, 1 page (both sides) of notes (handwritten by you) allowed. Graphing/programmable calculators OK. No tablets, laptops, wireless devices. No cellphones, even for a
calculator or watch.
Find the magni

Physics 170 Quiz 7C, Oct. 28, 2014 Solution
Closed book, 1 page (both sides) of notes (handwritten by you) allowed. Graphing/programmable calculators OK. No tablets, laptops, wireless devices. No cellphones, even for a
calculator or watch.
IF YOU SOLVE EQ

UBC Physics 170
Final Exam
December 16, 2013
Please turn off your cell phones during the exam.
Write on this examination. You can write on the backs of the pages too.
If you use the backs of pages or extra pages, label which problem you are doing.
You may

UBC Physics 170
Midterm Solutions
October 18, 2013
1.
The 10 meter massless rod is connected to the ground by a ball and socket joint. Find the
tension TA , unstretched spring length LB , and compression force C R in the rod if the suspended
mass D is 5

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1.! This device is used to lift a pipe. If the coefcient of static friction at A and B is S , nd the
formula for the minimum dimension b as a function of d, h, S and that allows a pipe of any
weight to be lifted.
The upwa

Physics 170 Quiz 6B, Oct. 21, 2014 Solution
Closed book, 1 page (both sides) of notes (handwritten by you) allowed. Graphing/programmable calculators OK. No tablets, laptops, wireless devices. No cellphones, even for a
calculator or watch.
IF YOU SOLVE EQ

Physics 170 Quiz 3C, Sept. 23, 2014 Solution
Closed book, 1 page (both sides) of notes (handwritten by you) allowed. Graphing/programmable calculators OK. No tablets, laptops, wireless devices. No cellphones, even for a
z
calculator or watch.
a
IF YOU SOL

Physics 170 Quiz 4D, Sept. 30, 2014 Solution
Closed book, 1 page (both sides) of notes (handwritten by you) allowed. Graphing/programmable calculators OK. No tablets, laptops, wireless devices. No cellphones, even for a
calculator or watch.
IF YOU SOLVE E

Physics 170 Quiz 2A, Sept. 16, 2014 Solution
Closed book, 1 page (both sides) of notes (handwritten by you) allowed. Graphing/programmable calculators OK. No tablets, laptops, wireless devices. No cellphones, even for a
calculator or watch.
Two ropes D an

L35. Three forces act on the bracket. Determine the force is and magnitucle direction0 of F1so that the resultant of x' alongthepositive axisandhasa magnitude 1 kN' directed
4 - 4s0N
13 - 200N

)
Problem 2-47 Determinethe magnitude the resultantforce and its direction measured of clockwise from the positivex axis. Units Used: kN=103N
Given: Fl =20kN Fz=40kN F;:sokN 0:60deg
d = l e : 3 f = 4 Solution: J + Fo- rF,;
FR" =
FJ
- l
"f
\
FR* = 58.
2 .

I
Problem 2-75 Three forcesact on the hook. If the resultantforce Fo has a magnitude and direction as shown,determinethe magnitudeand the coordinatedirection anglesof force Fr. Given: Fn = l20N F/ =8oN Fz = ll0 N c = 3 d = 4 0=30deg 0=45deg
Solutton
Flt
l

2-75. Three forces act on the hook. If the resultant force Fp has a magnitude and direction as shown, determine the magnitude and the coordinate direction angles of force F3.
r;:
120N

I
Problem2-121 The two cablesexertthe forcesshownon the pole.Determine magnitude the the of projected component ofeach forceacting alongthe axisOA of the pole. Given: Fl=5oN Fz=35N
a
h
.
I t \
,f
/r h'l
i
= l m = 3 m = 2 m
c
d = 5 m 4 m 6 m 4 m Solution:

I
: ,-ill'. The two cablesexert the forces shown on the pole. Determine the magnitude of the projected component of eachforce acting along the axis OA of the pole'
z
l.
4m
4m
o,
5m
>'

'i3-4E. If the bucket and its contentshavea total weight of 20 lb, determinethe force in the supportingcablesDrl, DB.and DC.
,-=1fr,-fJ.*t
"*-r-#,*|r*fr.r
= E4 o: fir^-fir* =o
2.5fl
l-
:><,
I ttL
1 flr l.F*
14 = o; -fin^ - ,o,* |r,r= o
E4 - 0; +sF^
F u =

Physics 170 Quiz 5A, Oct. 7, 2014 Solution
Closed book, 1 page (both sides) of notes (handwritten by you) allowed. Graphing/programmable calculators OK. No tablets, laptops, wireless devices. No cellphones, even for a
calculator or watch.
IF YOU SOLVE EQU