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