You are to turn in this final and the scantron to the front when finished.

Size: px

Start display at page:

Download "You are to turn in this final and the scantron to the front when finished."

Scott Jones
5 years ago
Views:

1 Physics Fall 00: Final Exa Vesion B Nae: Quiz Code Nube: Closed book. No wok needs to be shown fo ultiple-choice questions.. Conside a ass on a sping that is undegoing siple haonic otion. In this siple haonic otion syste, the agnitude of the acceleation is geatest when: a. the displaceent is zeo. b. the foce is zeo. c. the speed is axiu. d. the displaceent is axiu. e. the speed is exactly half of its axiu value.. An inelastic collision is one in which: a. oentu is conseved but kinetic enegy is not conseved. b. total ass is not conseved but oentu is conseved. c. neithe kinetic enegy no oentu is conseved. d. oentu is not conseved but kinetic enegy is conseved. e. the kinetic enegy of the syste inceases afte the collision. 3. Joyce hits a 0.75 kg hockey puck, giving it an initial velocity of 3.0 /s. The puck slides on level ice. If the coefficient of kinetic fiction between the ice and the puck is 0.050, how fa will the puck slide befoe stopping? a etes. b. 9. etes. c. 68 etes. d. 3.4 etes. e. 6.9 etes. 4. A 5 kg cannonball is launched fo gound level at a speed 00 /s at an angle of 40.0 o above the hoizontal. How long will it take until the cannonball lands? Assue it lands at gound level. a seconds. b. 0. seconds. c seconds. d. 3. seconds. e seconds. 5. A cheetah can un at appoxiately 00 k/h and a gazelle at 80.0 k/h. If both anials ae unning at full speed, with the gazelle initially 70.0 ahead, how long befoe the cheetah catches its pey? a. 4.0 seconds. b..6 seconds. c seconds. d. 0.7 seconds. e. 5. seconds You ae to tun in this final and the scanton to the font when finished.

Physics Fall 00: Final Exa Vesion B 6. A pendulu consists of a assive bob at the end of a sting (as shown to the ight). If the ass of the bob is doubled, what happens to the peiod of the pendulu? a. The peiod of the pendulu will decease.

The ope akes an angle of 0.0 o above the hoizontal, and the tension in the ope is 50.0 N. What is the agnitude of the noal foce of the floo on the box? a. 50 N. b. 03 N. c. 7. N. d. 33 N. e. 47.0 N. 8.

2 Physics Fall 00: Final Exa Vesion B 6. A pendulu consists of a assive bob at the end of a sting (as shown to the ight). If the ass of the bob is doubled, what happens to the peiod of the pendulu? a. The peiod of the pendulu will decease. b. The peiod of the pendulu will incease. c. The peiod of the pendulu will eain the sae. 7. Jaes is using a ope to pull a box that weighs 50 N acoss a level suface with constant velocity. The ope akes an angle of 0.0 o above the hoizontal, and the tension in the ope is 50.0 N. What is the agnitude of the noal foce of the floo on the box? a. 50 N. b. 03 N. c. 7. N. d. 33 N. e N. 8. An outfielde thows a 0.50 kg baseball at a speed of 40.0 /s at an initial angle of 30.0 o with espect to the hoizontal. What is the kinetic enegy of the baseball at the highest point of its otion? Ignoe ai esistance. a. zeo. b. 0 J. c J. d. 5.0 J. e J. 9. In the position vs. tie gaph shown to the ight, the positions of two oving objects (A and B) ae given fo a tie peiod of 4 seconds. When will object A and object B have the sae speed? a. At t = 3 second. b. At t = seconds. c. At t = seconds. d. They have the sae speed duing the entie tie peiod of 4 seconds. e. They neve have the sae speed duing the entie tie peiod of 4 seconds You ae to tun in this final and the scanton to the font when finished.

3 Physics Fall 00: Final Exa Vesion B 3 0. A toy cat oves with a kinetic enegy of 0 Joules. If it late oves with twice the speed, its kinetic enegy will now be: a. 0 Joules. b. 0 Joules. c. 30 Joules. d. 80 Joules. e. 40 Joules.. Muons ae paticles that ae ceated in the uppe atosphee by adiation fo the Sun. The ean lifetie of the uon in its own efeence fae is.0 µs. If the uon is taveling at 0.990c, what will be its lifetie to a stationay obseve on Eath? a..0 µs. b. 5.6 µs. c. 0.0 µs. d µs. e µs.. Estiate the nube of ties an aveage peson s heat beats in a lifetie. Assue the aveage heat ate is 79 beats/inute and a lifespan of 73 yeas. a beats. b beats. c beats. d beats. e. 0 beats. 3. A cannonball is shot fo a cannon at an angle of 45 o above the hoizontal. Which of the following choices is coect concening the esulting pojectile otion? a. The speed is zeo at the top of its path. b. The speed is a non-zeo iniu at the top of its path. c. The speed is a axiu at the top of its path. d. The acceleation at the top of its path is zeo. e. The speed is 9.8 /s at the top of its path. 4. A spaceship flies by Eath on its way to Mas. The spaceship has a length of 00 etes when it is easued at est. A peson on Eath obseves the length of the spaceship to be 3 etes. What is the speed of the spaceship elative to Eath? a c. b. 0.3c. c. 0.83c. d. 0.95c. e. 0.69c You ae to tun in this final and the scanton to the font when finished.

Physics Fall 00: Final Exa Vesion B 4 5. A high fountain of wate is in the cente of a cicula pool of wate. You walk the cicufeence of the pool and easue it to be 50 etes.

Beats in sound efe to: a. b. c. d. e. a cobination of two waves of slightly diffeent fequencies. an effect in which a souce oves towad an obseve. an effect in which a souce oves away fo an obseve.

If she now inceases the fequency of thowing the pebbles, what will happen to the velocity and the wavelength of the esulting wate waves? a. The wavelength of the wate waves will eain the sae and the velocity of the wate waves will incease.

The wavelength of the wate waves will incease and the velocity of the wate waves will eain the sae. d.

4 Physics Fall 00: Final Exa Vesion B 4 5. A high fountain of wate is in the cente of a cicula pool of wate. You walk the cicufeence of the pool and easue it to be 50 etes. You then stand at the edge of the pool and use a potacto to gauge the angle of elevation of the top of the fountain. It is 55. How high is the fountain? a. b. c. d. e Beats in sound efe to: a. b. c. d. e. a cobination of two waves of slightly diffeent fequencies. an effect in which a souce oves towad an obseve. an effect in which a souce oves away fo an obseve. an intefeence of two waves of the sae fequency. a bending of the wave due to a changing ediu. 7. A Physics student is ceating wate waves by thowing pebbles with a fequency of.0 Hz into a pool of wate. If she now inceases the fequency of thowing the pebbles, what will happen to the velocity and the wavelength of the esulting wate waves? a. The wavelength of the wate waves will eain the sae and the velocity of the wate waves will incease. b. The wavelength of the wate waves will eain the sae and the velocity of the wate waves will decease. c. The wavelength of the wate waves will incease and the velocity of the wate waves will eain the sae. d. The wavelength of the wate waves will decease and the velocity of the wate waves will eain the sae. e. Both the wavelength of the wate waves and the velocity of the wate waves will eain the sae. 8. Suppose you ae an astonaut being paid accoding to the tie you spend taveling in space. You ake a 5 light-yea voyage to the sta Vega taveling at a speed of 0.75c. Upon you etun to Eath you e asked how you d like to be paid: accoding to the tie elapsed on a clock on Eath o accoding to you ship s clock. Which do you choose to axiize you paycheck? a. You ship s clock. b. The Eath clock. c. Eithe clock, as they will both give you the paycheck aount You ae to tun in this final and the scanton to the font when finished.

5 Physics Fall 00: Final Exa Vesion B 5 9. An ideal sping is used to fie a 5.0 g pellet hoizontally. The sping has a sping constant of 0 N/ and is initially copessed by 7.0 c. The kinetic enegy of the pellet as it leaves the sping is: a..5 x 0 J. b. 4.9 x 0 J. c. 9.8 x 0 J. d..4 J. e..6 J. 0. Fo a wave on the ocean, the aplitude is: a. the distance between cests. b. the height diffeence between a cest and a tough. c. how fa the wave goes up on the beach. d. one half the height diffeence between a cest and a tough. e. the distance between toughs.. A geen cue ball stikes anothe identical ball that is initially at est. The geen cue ball coes to est as a esult of the collision. Which of the following stateents is tue? a. The oentu of the geen cue ball eains constant in the collision. b. The oentu of the geen cue ball inceases due to the collision. c. The oentu of the second pool ball eains constant in the collision. d. The oentu of the two billiad ball syste inceases due to the collision. e. The oentu of the two billiad ball syste eains constant in the collision.. A,500 kg tuck oving at 0.0 /s stikes a ca waiting at a taffic light, hooking bupes. The two continue to ove togethe at 7.00 /s. What was the ass of the stuck ca? a.,070 kg. b.,550 kg. c.,730 kg. d.,00 kg. e.,500 kg. 3. A siple pendulu consists of a.0 kg ass attached to a sting. It is eleased fo est at point X as shown in the figue to the ight. Point X is.85 etes highe than the lowest of its otion, point Y. The pendulu s speed at point Y is: a..9 /s. b. 6.0 /s. c. 3.6 /s. d /s. e. 36 /s You ae to tun in this final and the scanton to the font when finished.

6 Physics Fall 00: Final Exa Vesion B 6 4. A bullet is fied hoizontally fo a handgun at a taget 0.0 away. If the initial speed of the bullet as it leaves the gun is 00 /s, how fa vetically will the bullet have dopped by the tie it hits the taget? Ignoe ai esistance. a b c d e An outside loudspeake eits sound waves with a powe output of 00 Watts. What is the intensity level, β (in decibels), at a distance of 0.0 etes fo the souce? (Assue a spheical speading of the sound.) a. 0 db. b. 09 db. c..8 db. d. 40 db. e db. 6. Cathy hits a 0.80 kg hockey puck giving it an initial velocity of 5 /s to the ight. The puck slides on level ice. The coefficient of kinetic fiction between the ice and the puck is 0.0. Which one of the following foce diagas would be coect fo the hockey puck.0 seconds afte it is hit by Cathy (and still oving to the ight as shown)? puck at.0 seconds.03.0 You ae to tun in this final and the scanton to the font when finished.

7 Physics Fall 00: Final Exa Vesion B 7 Equations and constants: ) # x = cos + = x + y + ' *. -# y y = sin ( + = tan ( + x' /, # v x = v ox + ax t ' x = (v ox + v x ) t ( x = v ox t + ax t v x = (v ox ) + ax x ) # v y = v oy + ay t ' y = (v oy + v y ) t ( y = v oy t + ay t v y = (v oy ) + ay y ) x = x f # x i ( ) speed = d avg ' t * v aavg = t # ' v = x avg t ( v ( 0 f µ F # F = 0 a = 0 ' a = tli #0 t s s N # Fx = ax ' ) # fk = µ k FN ' F = a ( ( Fy = ay ) x v = tli Fg = g ( Fon = Fon ) #0 t * ' PEgav = gh KE = v PE sping = k (x ) Fsping = k (#x ) W = F x cos# W W net = W + W + W 3... W nc = E ec E ec = KE + PE gav + PE sping P = F v = p = v #t v #p I = F t = p = ( vf # v i ) pi = p f vi + v i = v f + v f F extenal = #t ) M 'F = G ' # M Eath = kg k * ' F Hooke' s = #k (x ) a = x 6 'G = # N ' REath = ( kg + ( L k k Tpend = f = = #f = A x ) Tasssping = # ( k T g x = Acos(t ) = Acos(#ft ) v = A# sin(#t ) = Af sin(ft ) FT a = A# cos(#t ) = (f ) Acos(ft ) v wave = f = c = f v sting = µ T Powe Powe I= = T Aea 4 v sound ai at 0 o C = 33 s v sound ai at 0 o C = 343 s v sound ai = 33 s 73K #I v ± vo = (0dB) log ( Io =.0 0# W I p =.0 W f o = f s sound ' () con = # = n Io ' # v sound vs # v v n F ' = # ( ) des = n + )* f n,sting = nf = n ' = ' T f n,aiopen = nf = n ( n =,,3,... # L # L µ L ' ( # v L v f n,aiclosed = nf = n ( n =,3,5,... f beat = f f = = t = #t o L = o 4L ' c # v =± 5 b ± b 4ac p = v c = /s light - yea = etes x = a Acicle CicuCicle = AeaRectangle = length width = Asphee = 4 g = 9.80 /s M g = G 60 s = in 60 in = h 00 c =,000 = k,000 gas = kg 4 hs = day 365 days = y.54 c = in in = ft 5, 80 ft = i,609 = i = ft ad = ev = 360 deg You ae to tun in this final and the scanton to the font when finished.

Physics 1A (a) Fall 2010: FINAL Version A 1. Comments:

Physics 1A (a) Fall 2010: FINAL Version A 1. Comments: Physics A (a) Fall 00: FINAL Vesion A Name o Initials: Couse 3-digit Code Comments: Closed book. No wok needs to be shown fo multiple-choice questions.. A helicopte is taveling at 60 m/s at a constant