Could someone just verify that my answers are correct and if not please explain
ID: 2041375 • Letter: C
Question
Could someone just verify that my answers are correct and if not please explain the correct answer. Thank you!
6. A sculpture consists of 4 solid spheres of different masses (3.6 kg. 2.8 kg, 1.8 kg, and 1.4 kg) attached by 3 massless rods with different lengths as shown. The diagram provide below is not drawn to scale. Assume the rods were inserted in each sphere and the lengths of the rods provided were measured from the centers of each sphere. 85 cm The center of mass of the sculpture is greater than the center of gravity of the sculpture .6 kg 6. The center of mass of the sculpture is located near a position that is above the center of the sculpture The center of mass of the sculpture is located on the left and below the center of the sculpture If the solid spheres were switched to different positions on the sculpture, the center of mass of the sculpture would remain at the same position c. 55 em e. The center of mass of an object is located in the 3.6 kg sphere f. The center of mass of the sculpture is located in the center of the scuipture. Questions 7 8 refer to a CD that speeds up from 0 to 635 revolutions per minute (rpms)C counterclockwise to in 4.5 seconds. 7. What is the direction ot the angular acceleration during this time?(-(.4.5 c. 0 8. What is the a. 3810 b. 890 rad/s c. 66 rads d. 141 radse. 24 rad's2 (t) 15 rad/s 9. Which of the following statements is true? Bones in the human body are solid and consist of only one type of bony material that is both dense and rigid b. The period of a satelite in circular orbit around the earth depends on the satellite's mass. The point on the bottom of any rolling object is at rest relative to the surface it is on. d. A long-handled jack requires more force than a short-handled jack to lift one end of a vehicle to remove a tire. e A child standing on his or her bicycle while riding has a larger critical angle than the child sitting on the bicycle while riding Y The torque that causes a solid marble to roll down an incline is due to the weight of the marble. 10. Which of the following statements is true? a. A centrifugal force pushes the driver toward her door as she makes a quick right-hand tum. b. A boy swinging on swing-set has no net force acting him at the bottom of his swing. astronaut in an orbiting space-station around earth has no actual weight or is 'weightless d.A terranaut who falls into a tunnel through the core from one end of the Earth to the other end will fall away from the Earth. e. A normal force keeps a child moving in a circle in the sily silo ride. 11. A rotating wheel is moving clockwise. If the wheel is slowing up. d. it has a) angular velocity and a () angular acceleration. it has a () angular velocity and a () angular acceleration. it has a (0) angular velocity and a (+) angular acceleration. it has a angular velocity and a (+)angular acceleration it has a () angular velocity and a (0) angular acceleration. it has a (+) angular velocity and a (+) angular acceleration. it has a ( angular velocity and a (0) angular acceleration,Explanation / Answer
6] b is correct
7]correct
8] correct
9]c is correct because the point of a ball rolling which is in contact with the ground has zero velocity.
10] d is wrong. c (the have acceleration g) and e (Normal provides cetripetal force) both seems correct.
11] a is correct, because clockwise angular acceleration is positive, angular acceleration is in anticloclwise, so is negative.