3) Two equal forces are applied to a door at the doorknob. The first force is applied perpendicular to the door; the second force is applied at 30° to the plane of the door. Which force exerts the greater torque? Answer: O A) the first applied perpendicular to the door O B) the second applied at an angle O c) both exert equal non-zero torques O D both exert zero torques 4) Consider two unequal masses, Mand m. Which of the following statements is false? Answer: O A) The center of mass lies on the line joining the centers of each mass. O B) The center of mass is closer to the larger mass. O C) t is possible for the center of mass to lie within one of the objects. O D) If a uniform rod of mass m were to join the two masses, this would not alter the position of the center of mass of the system without the rod present. What is
3) Two equal forces are applied to a door at the doorknob. The first force is applied perpendicular to the door; the second force is applied at 30° to the plane of the door. Which force exerts the greater torque? Answer: O A) the first applied perpendicular to the door O B) the second applied at an angle O c) both exert equal non-zero torques O D both exert zero torques 4) Consider two unequal masses, Mand m. Which of the following statements is false? Answer: O A) The center of mass lies on the line joining the centers of each mass. O B) The center of mass is closer to the larger mass. O C) t is possible for the center of mass to lie within one of the objects. O D) If a uniform rod of mass m were to join the two masses, this would not alter the position of the center of mass of the system without the rod present. What is
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Q-3,4,5,6
Transcribed Image Text:3) Two equal forces are applied to a door at the doorknob. The first force is applied perpendicular to the door; the second force is
applied at 30° to the plane of the door. Which force exerts the greater torque?
Answer:
O A) the first applied perpendicular to the door
O B) the second applied at an angle
O ) both exert equal non-zero torques
O D) both exert zero torques
4) Consider two unequal masses, Mand m. Which of the following statements is false?
Answer:
O A) The center of mass lies on the line joining the centers of each mass.
O B) The center of mass is closer to the larger mass.
O c)tis possible for the center of mass to lie within one of the objects.
O D) If a uniform rod of mass m were to join the two masses, this would not alter the position of the center of mass of the system without the rod present.
5) The center of mass of a two-particle system is at the origin. One particle is located at (3.0 m, 0) and has a mass of 2.0 kg. What is
the location of the second mass of 3.0 kg?
Answer:
O A) (-3.0 m, 0)
O B) (-2.0 m. 0)
O C)(2.0 m, 0)
O D) (3.0 m, 0)
6) Three masses, 1.0 kg, 2.0 kg, and 3.0 kg, are located at (0, 0), (1.0 m, 1.0 m), and (2.0 m, -2.0 m), respectively. What is the location
of the center of mass of the system?
Answer:
O A) (1.3 m, 0.87 m)
O B) (1.3 m, -0.67 m)
O c)(-1.3 m. 0.67 m)
O D)(-1.3 m. -0.67 m)
7) Tightrope walkers walk with a long flexible rod in order to
Answer:
O A) increase their total weight
O B) allow both hands to hold onto something
O c lower their center of mass
O D) move faster along the rope
8) A 4.00-kg mass sits at the origin, and a 10.0-kg mass sits at x = + 21.0 m. Where is the center of mass on the x-axis?
Answer:
O A) +7.00 m
O B) +10.5 m
O c) +14.0 m
O D) +15.0 m
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