Straighterline PHY250 General Physics I Graded Exam 1 (New Version June 2024)

Question 1 Correct 6.00 points out of 6.00 A ball rolls with a speed of 2 m /s along a horizontal table. If the ball rolls off the table and lands on the floor 0.50 m from the edge of the table, what is the height of the table? Select one: a. 1.2 m b. 0.1 m c. 0.3 m d. 0.6 m Question 2 Correct 6.00 points out of 6.00 If a vector pointing toward the north is crossed with one pointing toward the east, the resulting vector is pointing . Select one: a. up b. down c. south d. None of the other choices; the vector is zero. Straighterline PHY250 General Physics I Graded Exam 1 (New Version June 2024) We are a team of experts offering class attendance for all Straighterline, Online ATI, HESI, NCLEX, Portage Learning, Sophia etc courses (including final proctored exams!!). We also write essays, discussion posts, research papers and school assignments. Should you need any of these services, Contact us via email: or : +1 (540) 753-5914. Guaranteed Passing! PHY250_TW | Chapter 3: Dynamics Started on State Finished Completed on Time taken 57 mins 37 secs GradeQuestion 4 Correct 6.00 points out of 6.00 Consider a basket with 3.046 kg of fruit. When you weigh the whole package (fruit + basket), the reading on the scale is 4.2 kg. What is the most realistic weight of the basket alone? Select one: a. 1.2 kg b. 1.154 kg c. 1.15 kg d. 1 kg Question 5 Incorrect 0.00 points out of 6.00 Consider a mass m that is attached to a rope such that the mass is in uniform circular motion. Which of the following is the magnitude of the centripetal force? Select one: a. mv2/r2 b. mv /r c. m2v2/r2 d. mv2/r Question 3 Correct 6.00 points out of 6.00 When going around a cloverleaf, a car suddenly comes upon a long stretch of essentially frictionless ice. At this instant the car . Select one: a. continues around the corner, uniformly completing its circular trajectory b. continues around the corner, but at with a larger arc c. continues on in a straight line path d. begins to tumbleQuestion 7 Correct 6.00 points out of 6.00 The position of an object along the x-axis is described by the formula x = 2t3 4t. Which of the following are the correct formulas for the velocity and acceleration of the object? Select one: a. v = 2t2 t, a = 2t 4 b. v = 6t2 4, a = 12t c. v = (1/2)t4 2t2, a = (5/2)t5 (2/3)t3 d. v = 6t 4, a = 6 Question 6 Correct 6.00 points out of 6.00 Consider a mass of 85 kg lying on the ground. The coefficient of static friction between them is μs = 0.65. What is the minimum force you need to apply in order to slide the mass? Select one: a. 55.2 N b. 1,282 N c. 541 N d. 1,082 NFor the given velocity-time graph, select the corresponding position-time graph. Select one: a. b. c. d. Question 8 Incorrect 0.00 points out of 6.00Which graph best illustrates the following description of motion? A car starts at rest, accelerates at a constant rate until it cruises at a constant speed, and then brakes at a constant rate until it is moving at a constant, very slow speed. Select one: a. b. c. Question 9 Correct 6.00 points out of 6.00Question 10 Correct 6.00 points out of 6.00 Which of the following statements concerning friction between the surfaces of two objects is correct? Select one: a. The force of friction mostly depends on the nature of the two surfaces. b. The force of friction depends soley on the speed that the two surfaces are moving relative to each other. c. The force of friction always varies as the square of the area of contact between the two surfaces. d. The force of friction is dependent on both the speed that the two surfaces are moving relative to each other and the area of contact. d.Which graph best illustrates the following description of motion? A car starts at rest, accelerates at a constant rate until it comes up behind a motorcycle that is moving more slowly, then slows down to follow the motorcycle, maintaining a constant distance behind it. Once the motorcycle has turned, the driver of the car accelerates to a much faster speed and then maintains that speed. Select one: a. b. c. Question 11 Correct 6.00 points out of 6.00Question 12 Correct 6.00 points out of 6.00 Consider a sphere with a radius of 4.0830 m. What is its volume? Select one: a. 285 m3 b. 285.1193 m3 c. 285.12 m3 d. 285.1190 m3 Question 13 Incorrect 0.00 points out of 6.00 If the formula for work is given by W = F ⋅ d , how much work is done by 60 N force which is applied as 25∘ with respect to the 13 m displacement? Select one: a. 0 N⋅m b. 330 N⋅m c. 707 N⋅m d. 780 N⋅m d.Imagine that you push down on an object that is sitting on a frictionless table. Which of the following diagrams includes all the forces acting on the object? −→W : object′s weight −→Fy : force you apply to the object →N : normal force applied by table to the object → O : normal force applied by the object to the table Select one: a. b. c. Question 14 Correct 6.00 points out of 6.00Question 15 Correct 6.00 points out of 6.00 Which of the following is not an example of a vector? Select one: a. displacement b. velocity c. acceleration d. mass Question 16 Correct 6.00 points out of 6.00 Robert measures an object to be 5 m away, while his much twin sister Roberta measures the same object to be 3 m away. Which of the following statements must be true? Select one: a. Robert and Roberta are exactly 4 m apart. b. Robert and Roberta are exactly 2 m apart. c. Robert and Roberta are exactly 8 m apart. d. The separation between Robert and his sister cannot be calculated with the information given. d.Question 18 Correct 6.00 points out of 6.00 How is a kilogram defined? Select one: a. by a silicon crystal containing a certain number of atoms b. by a platinum brick in Europe c. by the mass of 10 cubic centimeters of water d. from the mass required to create a 1 Newton force Question 19 Correct 6.00 points out of 6.00 A projectile is launched from a height of 250 m with initial horizontal velocity of 50 m/s. What is the horizontal range of the projectile? Select one: a. 312 m b. 235 m c. 410 m d. 357 m e. None of the above Question 17 Incorrect 0.00 points out of 6.00 Given the position vector r (t) = 4t i + 3tj, which of the following is the acceleration vector? 2 Select one: a. → a (t) = 8ti + 3j a c. a 4 3 3 3 2 2 aQuestion 21 Correct 6.00 points out of 6.00 Which of the following is a correct statement concerning the velocity of a particle in uniform circular motion? Select one: a. The velocity is in the same direction as the angular velocity. b. The velocity is directed radially inward. c. The velocity is in the same direction as the centripetal acceleration. d. The velocity is constantly changing directions. Question 22 Correct 6.00 points out of 6.00 A car of mass m drives along a road. The road exerts a frictional force on each of the tires equivalent to f. The frictional force of air resitance R exerts a backwards force on the car. Assuming these are the only two forces in the horizontal direction, under which of the following relationships would the car move at a constant speed? Select one: a. 4 f = R c. f = N g cos mg e. None of the above Question 20 Correct 6.00 points out of 6.00 Which is not an mks unit? Select one: a. meter b. kilogram c. second d. centimeterQuestion 24 Correct 6.00 points out of 6.00 Consider a rectangle with a base of 0.567 m and a height of 1.606 m. What is its area? Select one: a. 0.910 m2 b. 0.911 m2 c. 0.9106020 m2 d. 0.9106 m2 Question 25 Correct 6.00 points out of 6.00 In space, far away from any planets, which of the following spacecraft requires the greatest force to accelerate? Select one: a. Megaship, the large and powerful, with a mass of 10 million kg b. the 100 kg Interstellar Child Scooter c. the sleek and aerodynamic 10,000 kg Speedstar d. none of the other choices as things are weightless in space Quiz navigation 1 2 3 4 5 6 7 8 9 10 Show one page at a time Question 23 Correct 6.00 points out of 6.00 Which of the following is correct concerning the centripetal acceleration of an object in uniform circular motion? Select one: a. The centripetal acceleration is directed radially outward. b. The centripetal acceleration is in the tangential direction. c. The centripetal acceleration is directed radially inward. d. The centripetal acceleration is constant throughout the path of the uniform circular motion.© 2023 StraighterLine. 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