Online Homework 3 Solutions

# Online Homework 3 Solutions - Falling Flowerpot A 5.4 kg...

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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: sit-M to The ‘Uf\ L15 [ij :Ja-wl m b) #163 : 53—3521. ‘le ‘" -— 1(9- 3 W/i‘YHaD-Srhj ; "- 21E: Era-{L a) 62:- x511 7. Zaail' u”?! 6? O _ (96.1?“ ’ZGW’ 205m) —- .— it ll i {as “ft-J J} '9 {J Farce-s 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 a-axis as show. Whal is the: magnitude 0f Fm. the net force acting an the object? Scale an Elevator II A 55-kg 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? mh-wmm« Laden“ m was m= N 5.. Mwawm swig (semis U’ “'0 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 tell-meet 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 left-right 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 hilt-U 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 Herrera-siklody during the Fall '08 term at Iowa State.

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Online Homework 3 Solutions - Falling Flowerpot A 5.4 kg...

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