Physics 115 Test 2 with answers - PHYS115 Fall 2012 1\/8 Test 2 g=9.8m\/s2 1inch=25.4mm 1pound=1lb=0.454kg 1poundforce=1lbf=1lbg 600lbf\/in a b c d 231N\/m

# Physics 115 Test 2 with answers - PHYS115 Fall 2012 1/8...

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PHYS115 g = 9.8 m 1 inch = 2 1 pound 1 pound ANSWE 600 lbf inch Question of 1 kilogWhat pow a.2b.1c.0 d. 8 ANSWE Potential pot E m This hap 1 day 1 Power = 5 - Fall 2012 m/s 2 25.4 mm = 1 lb = 0.45 force = 1 lb Qu 600 Wh R: 600 0.454 inch n 2 – The we gram. It drop wer does the 6 23 10 W 3 1.3 10 W 0 W 3 82 10 W R: l energy tran (change g pens over th 1 day 24 h 1 d work 1 time 86.4 4 kg f = 1 lb × g uestion 1 – T 0 lbf/in. hat is its spr g 1 in 25.4 1 eight in the a ps 20 cm per e gravitation nsferred to cl in height) he course of hour day 3600 hou 3 1.96 J 23 4 10 s The spring in ring constant m N/m 0 N/m t is not exten nch 3 105, 10 m adjacent wei r day. nal force exe lock (= work 1 9.8 0.2 1 day which secs. ur 86,40 6 3 10 J/s 2 1 / 8 n the adjacen t? nded or comp ,000 N/m 1 ight driven c ert on the clo k done on clo 1.96 joules h is 00 secs. 6 23 10 W nt car shock pressed, the 105 kN/m clock has a m ock?ock) is s Test 2 - N absorber ha e spring cons mass November 28, as a stiffness stant is zero 1 kg 20 c per 2012 s of g cm day
PHYS115 Question ANSWE Angular (unit of r Question How mu cane air h a. 1 b. 1 c. 1 d. 1 ANSWE Kinetic e Going fro 100 times ANSWE See book 5 - Fall 2012 n 3 – What is N m 2 /s kg m 2 /s kg m/s N m R: momentum rotational m n 4 – The air uch more/les have than 1 10 times mor 100 times mo 10 times less 100 times les R: nergy is 1 2 om speed 20 s bigger. Kin R: k, figure at bo s the SI unit m is (rotation ass) (unit o r in a hurrica s kinetic ene kg of air mo re ore ss mass speed 0 km/h to spe netic energy ottom of pag of angular m nal mass) (a of angular sp ane travels a ergy does 1 k oving at only 2 1 2 d mass eed 200 km/ involves (sp Questio coefficie ge 103 2 / 8 momentum? angular spee peed) kg m t 200 km/h. kg of this hu y 20 km/h? 2 s speed /h the speed peed x speed on 5 – Which ent of restitu the speed of cannot tell b the baseball the golf ball ? d) , so it has 2 1 m kg m s urri 1 2 mass sp gets 10x big d) which the h of the two ution? f the balls mu ecause both Test 2 - N s the unit 2 m / s . peed speed gger, so (spe en gets 100x balls has a g ust be know balls start fr November 28, . eed x speed) bigger. greater wn rom a 1 m he 2012 gets eight
PHYS115 Question How fast a.8b.2c.1d.2 ANSWE Argue as Collision 110 km/h Question particula The angu a. b. c. d. ANSWE Angular (rotation angular s so does t 5 - Fall 2012 n 6 – The bas t is the baseb 80 km/h 230 km/h 120 km/h 210 km/h R: s in book pag n speed is 12 h. Add bat sp n 7 – Spinnin ar satellite de ular moment … 25 times sm … 5 times sm … 5 times lar … unchanged R: momentum nal mass) (a speed gets 5 he angular m 120 km 80 km/h seball’s coef ball after the ge 106/107. 0 + 80 = 200 peed of 120 k ng satellites ecide to incr tum of the s maller maller rger d m is angular spee x bigger, momentum. m/h ficient of res e bat hit it?

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