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Unformatted text preview: Falling Flowerpot A 5.4 kg ﬂowerpot drops from a tall building. The initial speed of the pot is zero, and you
may neglect air resistance. a} What is the magnitude of the force acting on the pot while it is in the air LE 3 after it begins to fall?
h) After the pet has Fallen 35 In, what is its speed?
e} After the pet has fallen 35 m, it enters a viscous liquid, which brings it to rest over a distance of 1.5 m. Assuming constant deceieration over this distance, what is the magnitude of this deceleration“?
d} What is the Force exerted on the liquid by the pot'IJl ma. ($.Q—Wj)(cl.ﬂ ( T114119 ch"! incla‘lﬂjwtlﬁms‘t % ‘hwﬂ Emu; 175‘!“ o: sitM to The ‘Uf\ L15 [ij :Jawl
m b) #163 : 53—3521. ‘le ‘" — 1(9 3 W/i‘YHaDSrhj ; " 21E: Era{L a) 62: x511 7. Zaail'
u”?! 6? O _ (96.1?“ ’ZGW’ 205m) — .— it
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{J Farces The: forms FE, F; and F3 act on an object as sham in the fraa—bady diagram above. F.
has a magnimdc of E N while F1 and F3 each have a magnide of3 N. All forces make
angles afﬁﬂ“ with the aaxis as show. Whal is the: magnitude 0f Fm. the net force acting an the object? Scale an Elevator II A 55kg girl weighs herself by standing en a scale in an elevator. What dees the scale
read when: a] the elevator is descending at a constant rate of 11 mfs?
h] the elevator is accelerating dewnward at 1.3 lute}?
c] the elevator is accelerating upward at 1.3 natal? d] the elevator is ascending at 12 mix but its speed is decreasing by 3 ms in each second? mhwmm« Laden“ m was m= N 5.. Mwawm
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a) 9:0 mémf‘J‘ifl‘ Three Bleeks Blocks of mass 3. ti. and 9 kg are lined up them left to: right in that order an a ﬁ‘ietienless
surface are each black is teuehing the next one. A rightward~peinting three of magnitude
1? N is applied In the tellmeet block. a) What is the magnitude of the three that the middle hleek exerts an the righh‘nest ene‘?
11} What is the magnitude er the three that the Ieﬂsnest block exerts en the middle one?
1:) Suppose new that the leftright order of the blocks is reversed. New ﬁnd the
magnitude of the three that the leﬁmest tiles}: exerts an the middle one? :F'Eu mm mm sew rev‘1 Marmot)
.Eo/u. dehme The WE‘LLW“ ’F :(m.+m1»ﬂe)ﬂa Mass on two strings A block of mass M = 15 kg is suspended at rost by two sln'ogs attaoliod to walls. as
shown in tho ﬁguro. T11: loft string is horizontal and the right string mskos an anglo E =
51]“ with the horizontal. What is the tonsion in the loft string? [Assume the ring when: the
strings some togethor is massloss}. Pendulum in Car A as kg sphere hangs on a string ﬁorn the ceiling of an automobile. The car has a constant horizontal acceleration and the string is displaced an angle '3 = 65.2“ from the
vertical. To a person sitting inside the car, it appears that the sphere is motionless {the
angle between the sphere and the vertical is constant}. What is the magnitude of the acceleration of the car? la,
in Mﬂwfi semicl hiltU 2 ﬁéﬂﬂﬂi x: TEMG ‘ ““i {on Tmﬁ — m3 : O (3310» Ji. ,9 .
'FT 3 ———t'=~ 43:19 2. m ...
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This homework help was uploaded on 03/27/2008 for the course PHYS 221 taught by Professor Herrerasiklody during the Fall '08 term at Iowa State.
 Fall '08
 HerreraSiklody
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