Question

Notre Dame University Faculty of Engineering seawater jet hits a tank aluminum (p 280o kg/m3) that is subme attached through a pulley system to a cylindrical solid block of s submerged in a pool of sea water as shown in Figure P The diar-stance between the eseawaterjet is A = 0.15m2 and θ-70". The coefficient of 1. l area of the n the wheels of the cart and the ground is assumed to be equal to 0.04. num block is 1.75 m and its length L = 2.5 m. At the instant shown in ling resistan rolli The diameter of the aluminum er of the alu ure, the mass of the cart and the water in it is equal to 250 kg jet speed is constant and equal to nitially the tank is assumed stationary and the jet speed is cosm s m/s. Compute the value of h, for which that cart will just start will just start moving. t g engineer claims that, for a certain value of θ tion (5 points: A young different from the one shown in the figure), if the jet speed was increased to the tires were assumed frictionless and the block is now fully submerged at oving to the left at a terminal speed of 20 m/s. Can you 0 m/s, 6 all times, the cart will be m validate this claim by computingthe value of θ for which this can happen? Water jet Sea Water Figure P1

Answer 1

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yi fr f a ALIGUST 2014

momenteum/ catenafngTne mom Forte transfend to Te cort due to et Csea cter Je). 0 ond Salinity of 3(g/h- ггс,

6 どくらー 2 Car t F= 3-546 , s N

m Don 12 02 Normal Com porant of tne ferte 03 04 EPTEMBER 2014 MTWTFS

ferce on ground The Pinstence to The. The imbalance Com penent of- cuun AUGUST 14 27 28290 appy sometimes-Lauren Oliver, Delirium

ecco The cant i NO he systenm tobe in tne systern -'· The puciont af me Aluminium should ba lanle i eAlminium LI。 PTEMBER2014 MTWTFSS 1234567 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Aty minium block- Displaced 31

01 CCrit imbalance feat c. 02 03 05 07 SEPTEMBER 2014 MTWTFSS 36 1 2 34567 78 9 10 11 12 13 14 38 15 16 17 18 19 20 21 39 22 23 24 25 26 27 28 40 29 30

tuisnt of tac つ ing Center, balan leit. to sf jet Con eote. mak posible oSJbC 1 2 3 32 45 6789 33 11 12 13 14 15 161 34 18 19 20 21 22 23 4 35 25 26 27 28 29 303 31

for ensle.of ad (42) n6 09 10 The fer me cylinder Guly Jabmerse Amin 12 The Net tenion into pape ill be 01 03 04 = 165-170-60 3d1、厂 05 06 SEPTEMBER 2014 3612〕4567 789 10 11 12 13 14 38 15 16 17 18 19 20 2 39 22 23 24 25 26 27 28 40 29 30

ch on 2014 AUGUST W MTWTFSS 31 10 7891 32 45 6 3 11.12 13 14 15 16

ch on 2014 AUGUST W MTWTFSS 31 10 7891 32 45 6 3 11.12 13 14 15 16

08- 09 10 12 01 02 03 04- )13 . -う1 05 06 SEPTEMBER2014 6123 4567 89 10 11 12 13 14 8 15 16 17 18 19 20 21 99 22 23 24 25 26 27 28 40 29 30

meve uirn 2014 AUGUST WkMTWTFss 123 31 32 4 5 6789 10 33 11 12 13 14 15 16 17 34 ใ8 19 20 21 22 23 24 35 25 26 27 28 29 30 3