Study Guide for Exam 1 - General Physics for Life Science Oriented Majors | PHYS 2414, Study notes of Physics

Download Study Guide for Exam 1 - General Physics for Life Science Oriented Majors | PHYS 2414 and more Study notes Physics in PDF only on Docsity! Study Questions for Exam 1 1) The side of a cube is creased by 5%. The percentage increase of the surface area of the cube is, a) 5% Satface areqs as” Spans= 4O85 Gyi0% Shaw bee Gesf= fo2/2% ©) 12% as 7 etsy = — d) 16% - e) 18% 2) The surface area of a sphere is increased by 8%. The percentage increase of the volume of the sphere is, x z a) 5% sme YOR FT Ses og -y Lie. 09 =P Preyahodr b) 10% wee r 12% _ ae Ow Va gnF Vacs _ 37 47 thes lore) (.oy}= 4 (2y= 2B e) 18% Vv are 3) The length 4.221 cm is added to 0.01 cm, The appropriately rounded sum is, in cm, a) 4.22 b) 4.2301 ; @423 422401 = 4a3) = 4.23 d) 4.2 4 ; e) 4.21 dost digg Scan 4) A cube is 1.0 inch in length on the side. The volume of the cube is, in centimeter cubed, a) 1.0x 10? = (le ; = A b) 84x 10! V ( ft c)3.5x10! ] ue 6x 10' @)7.5xi0° 5) Two bricks are released from the top of a building. Brick A weighs twice as much brick B. Brick A is dropped and the brick B is thrown straight up into the air. Which statement is true regarding this situation. ae alongs Aut. Same. A) Brick A accelerates faster than the brick B. aK<fablen a B) Brick B accelerates faster than the brick A. => Cre two bricks accelerate at the same rate during the entire time they are in the air. ) The bricks have the same magnitude of acceleration but the accelerations are in opposite directions. E) The two bricks have the same acceleration except for the instant when the brick B reaches its maximum height. 6) Which of the graphs of velocity versus time below shows the greatest constant positive acceleration? A) june) Cc) D) CD 0 [__o 0 v v v Vv v accelnabion on Vs € 15 slope. EF fag gpeabest sition, Fle0e. 7) Two objects A and B accelerate from rest with the same constant acceleration. Object A accelerates twice as long as object B. Which statement is true concerning these objects at the end of their respective periods of acceleration? i t f= 2 Qt A) Object A will travel twice as far as object B. KF A {BpObject A will travel four times as far as object B. iF tas 2 t 5 C) Object A will travel eight times as far as object B. D) Object A will be moving four times faster than object B. E) Object A will be moving eight times faster than object B. at Ket z x, GE (aot ee Ges eT i 15) Which velocity vs. time graph corresponds to the following graph of position verses time t— t— 16) Can an object's velocity change direction when its acceleration is constant? A. No, this is not possible because it is always speeding up. B. No, this is not possible because it is always speeding up or always slowing down, but it can never turn around. Ore. this is possible, and a rock thrown straight up is an example. . Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example. E. none of the above. 17) A person standing at the edge of a cliff throws one ball straight up and another ball straight down. Both balls have the same initial speed. Neglecting air resistance, the ball that hits the ground below the cliff with the greater speed is the one initially thrown: A. upward they both have the same speed when they hit the ground. C. downward D. impossible to tell because they hit at different times E. none of these 18) To be dimensionally consistent, velocity [L/T], force [ML/T? ], mass [M], and length [L] must be related as follows: 1. a Velocity squared ~ force length/mass me. Le > L V b. Velocity squared ~ force mass/length eae yy T° ~ c. Velocity squared ~ mass length/force d. Velocity squared ~ force mass/length” e. Velocity squared ~ mass /force 19) An object starts with an initial velocity of 4.0 m/s and accelerates with an acceleration of + 4.0 m/s’ that lasts for 6.0 seconds. It then decelerates at ~ 2.0 ais* until its velocity is 4.0 m/s. The total distance covered is, /* part xz byt tzat™ ©. 4% a) 96m 2 4alseb3 rh (tat $63) = a 3 teen ato qt Ve Vgrat = tals + 4mlst-bs> Afanls 2 ‘ 2 d) 192m Vio Vy +2 dx 27 d= vgo~ V5 (ats f= Caenis | jem &)388 m Ra R(~Aen/s?) 7 Tod = deny (fen= Ahern 20) A student undergoes three displacements. The first displacement is 20 meters at an angle of 30 degrees SOUTH of EAST. The second displacement is 35 meters at an angle of 40 degrees NORTH of EAST. The third displacement is 20 meters at an angle of 45 degrees SOUTH of EAST. The y component, (NORTH - SOUTH) of the total displacement is, : ).64 meters SOUTH xg — 4 — BY 1.64 meters NORTH ge “oun Re c) 58.3 meters SOUTH Roe oN. d)} 58.3 meters NORTH . e) 22.5 meters SOUTH Fast = -Resaioe ~leen Seu. = T3ISAW = 225 third, = ~dom sags = ~C1 Man / Toke g = lon t+ atm ~MiNR>= Ml Daddy nn FL 21) A projectile is projected from the origin with a velocity of 15.0 m/s at an angle of 30 degrees above the horizontal. What is the location of the projectile 2.0 seconds later? aX= 46m, Y= 9.6m b) X= —26.0m, Y=-26.0m e)X= —36.0m, Y= —-46m (ayx = eX= 460m, Y= 260m, Y= —-4.6m 4.6m Vos ge Vsiaje? =z 7 Fabs Ve VFB? = Gals x2 Xa yt = Bals? AS> xO Ww a 7 Vogt “et = OSab lay -¢ Pant taf om 22) A projectile is projected from the origin with a velocity of 25.0 m/s at an angle of 50 degrees above the horizontal, What is the time of maximum height of the projectile? fa .95 8 b) 2.03 s c) 2.678 d) 3.018 e) 3.455 aS ants rd M4 ip Ly rat ox Ve,-~gt t= = k&F nls Sia fd = 4,2 als tog. bn 155'5 g ~ hals? 23) A projectile is projected from the origin with a velocity of 20.0 m/s at an angle of 30 degrees above the horizontal. The projectile lands on a roof that i is A Om n height, What is the velocity vector when the projectile hits the roof? .-- ~ a) Vx =13.2 m/s, Vy = — 2.96 m/s 3.23 m/s 3.55 m/s 3.95 m/s d) Vx =16.8 m/s,Vy = 3. x =17.3 m/s,Vy = ~4.65 m/s b) Vx =14,3 m/s,Vy = c) Vx =15.2 m/s,Vy = aPaly ge Urs Bowls + @3JO°= = Lemls + Seppe = ‘ty. doesn't a an 1m (1,3 als foals Jo 24) You drop a heavy steel ball from a certain height. At the same time you throw a light plastic) ball horizontally from the same height. Neglecting air resistance, which bail will hit the ground first, and which one will have the greater velocity when they hit. Hit First A) Hit at the same time @® Hit at the same time C) Hit at the same time D) Steel E) Steel Greater Velocity Steel Plastic They have the same velocity Plastic Steel - —- ee ae _ tha ay > yet (ealsy Z 7 v5 = Ae mlz Al ibeats\ in) Vy = oS mis dower etl) (Ti3als = -465 als