Return to page 1 Question 1 (2 points) Rotational Inertia Is the rotational equivalent of mass. No answer provided True False Return to page 2 Question 2 (2 points) A door handle is located 1.7 m from Its hinges. If the door is pulled with a force of 15 N what Is the torque created In opening the door? No answer provided a. 12.7 Nm b. 16.7 N C. 8.82 Nim d. 25.2 Nm Return to page 3 Question 3 (2 points) The center of gravity of a uniform object, like a board Is located No answer provided a. on elther end D. at the geometric center C. near the heavier end d. near the lighter end Return to page 4 Question 4 (2 points) Which of the following chokes describes rotational motion? No answer provided a. all parts of object move together b. some parts of object move faster than others c. object is treated as a single point d. motion is In a straight lineQuestion 5 (2 points) The lever arm is the distance from the force to the axis of rotation. No answer provided a. parallel b. perpendicular Return to page 6 Question 6 (2 points) Rotational Inertia depends on and distribution of mass. No answer provided a. force b. speed c. weight d. mass Return to page 7 Question 7 (2 points) Two or more forces acting on the same point at the same time can be replaced by the No answer provided a. equ brant b. vertical component C. resultant d. horizontal component Return to page & Question 8 (2 points) Which of these statements about torque is correct? No answer provided a. It Is expressed In newtons. b. It acts In a clockwise or counterclockwise direction. c. It is affected by force and the surface area of the object that Is In contact. d. Unbalanced torques always make an object rotate faster.Question 9 (2 points) A donut has no center of gravity No answer provided True False Return to page 10 Question 10 [2 points] Angular momentum Is conserved If there Is no net torque. dis No answer provided True False Return to page 11 Question 11 (2 points] When an object's center of gravity is outside its base of support, the object will, did No answer provided 3. remain stable D. fall C. balance Return to page 12 Question 12 [2 points] In rotational equilibrium problems, the pivot point should be located Its No answer provided a. at any point that will simplify calculations b. at the end of the object C. at the center of gravity d. at a point outside the object Return to page 13 Question 13 [2 points] Angular momentum = myr. did No answer provided True FalseReturn to page 14 Question 14 [2 points] To achieve rotational equilibrium ..... is No answer provided a. upward torques must equal downward torques. b. the greatest force must be located at the pivot point. c. all torques must be equal. d. clockwise torques must equal counterclockwise torques. Return to page 15 Question 15 [2 points] The distance from the turning point to the point of contact is the did No answer provided a. rotational Inertia b. center of mass C. torque d. lever arm Return to page 16 Question 16 [2 points] When a gymnast goes from an extended position to a tucked position, she her rotational Inertia and spins is No answer provided a. decreases; slower D. Increases; slower C. Increases, faster d. decreases; faster Return to page 17 Question 17 (2 points] If a football Is kicked so that the force is applied directly to the center of gravity, the ball wil to No answer provided a. move through the alr without rotating b. spin about Its axis through the allr c. tumble end-over-end through the air d. move in a counterclockwise spinReturn to page 18 Question 18 [2 points] Which of these units can represent torque? its No answer provided a. N b. NAm C. N/m2 d. N.m Return to page 18 Question 19 (2 points] You hang a 15 N mass .38 from the edge of a meter stick. In order to make the stick balance, you hang an unknown mass on the opposite side at a point .12 m from the edge. What is the unknown mass? Its No answer provided 3. 47.5 kg b. 4.85 kg C. 4.74 kg d .48 Kg Return to page 20 Question 20 [2 points] Another term for "balanced" Is rotational equi birlum. is No answer provided True False Return to page 21 Question 21 (2 points] A point at which all the weight of an object appears to be concentrated is called the It's No answer provided a. pivot point b. center of gravity C. lever arm . normalReturn to page 22 Question 22 [2 points] If an object Is NOT In a state of equilibrium, then No answer provided a. the object can be at rest b. the object is accelerating c. the object can be moving uniformly d. the net force on the object is zero Return to page 23 Question 23 [2 polnts] In order to play see-saw at the playground, two children must No answer provided a. have the same mass b. have the same weight c. produce equal torque d. sit at equal distances from center Return to page 24 Question 24 [2 points] The property of matter which resists changes In rotational motion is called is No answer provided a. rotational Inertia b. axis dependency c. droular mot d. translational Inertia Return to page 25 Question 25 (2 points] A wrench is used to loosen a rusty nut. If 78 Nm of torque and 221 N of force are used, how long is the wrench? No answer provided a. 0.35 m b. 0.04 m C. 2.8 m d. 0.29 m