Phys 1443 Review Guide (1)

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Jan 9, 2024

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Phys 1443 Lab Final Exam Review Q1) A group of students perform an experiment for Newton’s 2 nd Law. They graphed their measurements for the applied force to the cart vs. the acceleration of the cart and obtained a linear fit model represented by W = F + ma. What is the physical quantity of the y – intercept representing. A) Initial Velocity B) Mass of the Cart C) Force due to Friction D) Acceleration of the Cart E) None of the Above Q2) From the question above, what physical quantity is the slope representing. A) Mass of the Cart B) Acceleration C) Total Mass of the System D) Mass of the Weights Added to the Cart E) None of the Above Q3) A group of students performed the Newton’s 2 nd Law of Motion Experiment, starting with a .8kg mass placed on a cart of unknown mass. A hanging mass of .0t kg was used to apply a force. By using the additional mass from the cart, they slowly increase the hanging mass, thus keeping total mass constant, and they recorded an acceleration for each trial. The slope for W vs. a came out to be 1.84 kg. What is the mass of the cart? A) 1.84 kg B) .8 kg C) .99 kg D) .85 kg Q4) Which one of the following set of forces COULD NOT have a resultant of zero, if you were free to orient them in any way that you desire. A) 83 N, 146N, 208N B) 150lb, 83lb, 231lb C) 6 N, 12 N, 16 N, 22 N, 62N D) 4 lb, 8 lb, 17 lb, 25 lb, 42 lb

Q5) The force which is equal in magnitude but opposite in direction to the sum of all the forces acting on an object is called the A) Equilibrant B) Resultant C) Scalar D) Component E) None of the Above Q6) Two forces are acting on an object. A third force is used to bring the object back into balance (i.e., zero acceleration). This force is called. A) Normal Force B) Resultant C) Tension D) Equilibrant E) Torque Q7) An Initial force of 279 N @26 is applied to a ring on a force table. At what angle should a force of 279 N be applied to bring the ring to equilibrium. A) 180 B) 116 C) 206 D) 0 E) 420 Q8) If two bodies with different masses go around a circle of radius r with the same velocity, the centripetal acceleration of the smaller mass is. A) Greater than that of the Larger Mass B) The same as that of the Larger Mass C) Smaller than that of the Larger Mass D) None of the Above

Q9) A massive Chevy Suburban and a less-mass Dodge Neon are following each other. They both take a curve at the same speed. The centripetal force experienced by the suburban is ____ That of the Neon A) Less than B) Greater than C) Equal to Q10) An object with .398 kg mass is spun in a circle of constant radius of .142 m, and the speed is measured. The centripetal force applied to the object is increased, and the procedure is repeated for a few trails. The expected slope of a line of the plotted data for v^2 vs. force would be? A) 2.8 kg/m B) .06 kg*m C) .36 m/kg D) 1.28 m/kg E) Cannot be determined. Q11) A constant centripetal force of 4.75 N is applied to a .414 kg mass as it is spun around a constant radius of .191 m. What would be the expected value of the measured speed? A) 2.19 m/s B) .38 m/s C) 1.48 m/s D) 7.27 m/s E) Cannot be determined. Q12) A Chevy Suburban and a Volkswagen Beetle are both en route to a concert. They both are traveling at a steady speed of 25 m/s as they travel along a curve that has a constant radius of 30 meters. Which of the two vehicles undergoes the greater centripetal acceleration?

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Q13) A projectile, when fired horizontally, is found to have a speed of 3.55 m/s. When fired at an angle of 57 above the horizontal and at an initial height of .95m it will have a flight time of .839 seconds. What is the expected range of the projectile? Q14) From rest a 250 gram ballistic pendulum catches a moving 59 gram ball, and the center of gravity of the pair rises to a heigh of .026 meters. What is the initial speed of the ball. Q 15) A 67 gram projectile is fired repeatedly into a 238 gram pendulum. The center of gravity of the pendulum ball is determined to rise to a heigh of .066m determine the initial speed of the pendulum before it started to rise. Determine the initial speed of the ball just prior to combining with the pendulum. Q 16) A mass of m is placed directly on the positive x-axis at D on a balance table. To balance the table a mass of 2 must be placed where? Q 17) Masses are placed upon a balance table. Mass 1 is 100 grams and is placed at (-5,-1), mass 2 is 350 grams and is placed at (2,-1) and mass 3 is 300 grams, where should mass 3 be placed such that the center of gravity for the group of masses is centered at the origin. Q18) A group of students doing the rotational equilibrium lab were asked to place the following masses at these positions:125 grams at (1, – 5) in., 250 grams at (5, 5) in., 50 grams at ( – 8, – 5) in., and 250 grams at (3, – 5) in. Determine where the center of gravity for the group of masses is located.

Q19) A spring with spring constant of 156 N/m and a suspended mass of .9kg undergo SHO. What is the expected period. Q20) A mass of 0.800 kg is attached to a spring and set into simple harmonic motion. Data was collected for 5 seconds and then analyzed. The period of oscillation was found to be t = 0.326 s. From this data determine the spring constant k.

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