PHYS PRACTICE EXAM 2


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1 PHYS 1800 PRACTICE EXAM Pa I Muliple Choice Quesions [ ps each] Diecions: Cicle he one alenaive ha bes complees he saemen o answes he quesion. Unless ohewise saed, assume ideal condiions (no ai esisance, unifom gaviy, ec.) 1) Which of he following is NOT a uni fo angle? (A) deg (B) ad (C) ev (D) pm ) A wheel spins 30 imes in 6 seconds. Is peiod of evoluion equals (A) 0. sec (B) 5 sec (C) 6 sec (D) 30 sec 3) A ca moves a consan speed couneclockwise along a cicula ack. Wha is he diecion of he cenipeal foce acing on he ca when i eaches poin P? P (A) (B) (C) (D) 4) A change o ansfe of momenum is known as (A) enegy. (B) foce. (C) impulse. (D) wok. 5) A ball is dopped fom a vey all building. Ignoe ficion. As he ball falls, which of he following quaniies is conseved? (A) Momenum only. (B) Mechanical enegy only. (C) Boh momenum and mechanical enegy. (D) Neihe momenum no mechanical enegy.
2 6) A guy hows a bowling ball along a bowling alley. As i avels owad he pins, he ball has which of he following kineic enegies? (A) Tanslaional kineic enegy only. (B) Roaional kineic enegy only. (C) Boh anslaional and oaional kineic enegy. (D) Neihe anslaional no oaional kineic enegy 7) A bulle is sho fom a ifle. A he insan ha he bulle begins moving, wha is he elaionship beween he momenum of he bulle (magniude p B ) and he momenum of he ifle (magniude p R )? (A) p B p R (B) p B > p R (C) p B < p R (D) No enough info. 8) A solid ball and a hollow ball of equal mass and equal oue adius sa a he op of a amp. When hey ae eleased, he balls oll o he boom. Which of wo will each he boom fis? (A) The solid ball. (B) The hollow ball. (C) They each he boom simulaneously. (D) No enough info. 9) An ice skae is spinning upigh wih he ams ouseched. As she pulls he ams inwad, which of he following quaniies emains consan? (A) angula speed (B) angula displacemen (C) angula momenum (D) angula velociy 10) The Fis Condiion of Saic Equilibium pevens which of he following moions? (A) Roaion only. (B) Tanslaion only. (C) Tanslaion and oaion only. (D) Tanslaion and vibaion only.
3 Pa II Wod Poblems [0 ps each] Diecions: Show you wok o eceive full cedi. Box you final answe and ecod is appopiae uni. Poblem 1 A wheel iniially uning a 000 pm unifomly inceases is speed o 6600 pm in 9.00 sec. Calculae (A) he angula acceleaion of he wheel in ad/s. (B) he numbe of evoluions uned by he wheel duing he 9.00sec ineval.
4 Poblem A 1.00 m C B 0.75 m A bead (mass kg) is able o slide along a cuved wie as shown in he diagam. (A) The bead has a downwad speed of m/s a poin A (a a heigh of 1.00 m above poin B). Calculae he bead s speed a poin C (a a heigh of 0.75 m above poin B) if hee is no ficion pesen. (B) Suppose ha ficion is pesen. The bead sas a poin A wih a speed of m/s and slides o poin C whee i sops momenaily (befoe i slides back down). Calculae he enegy los by he bead in sliding fom poin A o poin C.
5 Poblem 3 A kg bulle moving hoizonally a 00 m/s sikes and passes hough a kg in can siing on a able. Immediaely afe impac, he can has a hoizonal speed of m/s. (A) Daw a momenum consevaion ( befoe and afe ) diagam. (B) Calculae he velociy of he bulle immediaely afe he collision. (C) Calculae he impulse expeienced by he can as a esul of he collision.
6 Poblem 4 35 cable 0.80 m 700 N A.00mee long unifom beam weighs 500 N and suppos a 700N load a one end. The beam is hinged o a wall and is held a es by a cable. (A) Calculae he ension in he cable. (B) Calculae he hoizonal foce acing on he beam fom he hinge. (C) Calculae he veical foce acing on he beam fom he hinge.
7 Fomulas and Consans Gm1m F ne ma w mg f µn F gav d x v s av v av a av G N m /kg x i + 1 v a v f vi + a x 1 ( v + v g 9.8 m/s i f ) v fy v iy g y iy 1 v g v fy viy g y x v ix d θ v ω ω π v a ω T c F c mac 1 ev π ad 360 v GM π v a T α T ω f ω i + α 1 1 θ ( ω f + ωi ) ω f ω i + α θ θ ωi + α W F x cosθ W µ n x f k P E K 1 mv U mgy gav U 1 elasic kx E K + U E 1 + W f E p mv p m v p F ne τ F sinθ τ ne Iα K o L Iω 1 Iω
WORK POWER AND ENERGY Consevaive foce a) A foce is said o be consevaive if he wok done by i is independen of pah followed by he body b) Wok done by a consevaive foce fo a closed pah is zeo c) Wok done
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