Mechanical Comprehension – Test 3 0% 61 Time Expired This subtest has 16 questions and a time limit of 20 minutes 1 / 16 Work done on a rigid body due to the sum of the torques integrated over the angle through with the body rotates is known as: axle rotation mass work rotational work torque Work done on a rigid body due to the sum of the torques integrated over the angle through with the body rotates is known as rotational work. Work done on a rigid body due to the sum of the torques integrated over the angle through with the body rotates is known as rotational work. 2 / 16 In what type of system does mass remain constant and the net external force on the system is zero? elastic system closed sytem frozen system balanced system In a closed system, mass remains constant and the net external force on the system is zero. In a closed system, mass remains constant and the net external force on the system is zero. 3 / 16 When two external gears mesh, they always turn in what directions? opposite upward same lower When two external gears mesh, they always turn in the opposite directions. When two external gears mesh, they always turn in the opposite directions. 4 / 16 Pressure is the amount of force within a specific: fluid area tube container Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 5 / 16 When two gears of unequal size are meshed together, the smaller of the two is usually called a: pinion rack shaft flywheel When two gears of unequal size are meshed together, the smaller of the two is usually called a pinion. When two gears of unequal size are meshed together, the smaller of the two is usually called a pinion. 6 / 16 When two gears of unequal size (meaning an unequal number of teeth) are meshed together, the smaller of the two is usually called a: shaft pinion rack flywheel When two gears of unequal size are meshed together, the smaller of the two is usually called a pinion. When two gears of unequal size are meshed together, the smaller of the two is usually called a pinion. 7 / 16 What is the benefit of using ball bearings or roller bearings in a machine? metal is smoother than oil sliding friction is less than rolling friction greater mass equals more friction rolling friction is less than sliding friction The benefit of using ball bearings or roller bearings in a machine is that rolling friction is always less than sliding friction. The benefit of using ball bearings or roller bearings in a machine is that rolling friction is always less than sliding friction. 8 / 16 The Law of Conservation of Momentum states: Momentum requires opposing forces total momentum of a closed system cannot change total mass of a system remains the same momentum of an open system remains the same The Law of Conservation of Momentum states that the total momentum of a closed system cannot change. The Law of Conservation of Momentum states that the total momentum of a closed system cannot change. 9 / 16 What can used to change rotary motion into linear motion? cams miter bevel worm drive Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. 10 / 16 A metric system of units means that values can be calculated by factors of: 10 infinity mass one A metric system of units means that values can be calculated by factors of 10. A metric system of units means that values can be calculated by factors of 10. 11 / 16 Pressure that is less than normal air pressure is called a: vacuum leak depression puncture Pressure that is less than normal air pressure is called a vacuum. Pressure that is less than normal air pressure is called a vacuum. 12 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: mass load friction effort In all machines, the actual mechanical advantage equals the resistance divided by the effort. In all machines, the actual mechanical advantage equals the resistance divided by the effort. 13 / 16 An inclined plane permits you to overcome a large: friction inertia fulcrum resistance An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 14 / 16 Equilibrium is achieved when the forces on a system are: inverse hyperactive net net balanced Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 15 / 16 What law does the force developed in a spring obey? Hooke's law Law of Least Resistance Newton's 16th law of motion Hamilton's law The force developed in a spring obeys Hooke's Law. The force developed in a spring obeys Hooke's Law. 16 / 16 Third-class levers increase speed at the expense of: mass friction force speed Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. Your score is 0% Exit