The transfer of energy is., power, work, movement, force, Watt is the unit used to express:, work, energy, force, power, The SI unit used to express (N*m) is, watt, joule, force, power, Using a force of 100 N, you push a shopping cart 20 cm. How much work did you do?, 2000 J, 100 J, 200 J, 1020 J, If Alan lifts a chair that weighs 60 N to the height of 0.5 m in 2 seconds and then carries it 10 m across the room, how much work does he do on the chair?, 0 J, 3 J, 30 J, 6 J, If it takes you 10 s to do 150 J of work on a box to move it up a ramp, what is your power output?, 15 W, 15 J, 1500 W, 1500 J, If a light bulb is on for 12 s, and during that time it uses 1200 J of electric energy, what is the power of the light bulb?, 10 W, 12 J, 100 W, 100 J, Power is calculated by, work × distance, work ÷ time, force × distance, force ÷ time, How is work calculated?, force × distance, force ÷ distance, power × distance, power ÷ distance, Work is being done when....., push car, push wall, lift book, slide horizontally, _____ is the work done on the machine, work input, work output, machine's work, all, How do machines make your work easier?, change force, change distance, increase both, both A & B, A machine can..., increase distance by decreasing force, increase both, increase neither, decrease both, What is the correct way to calculate mechanical advantage?, input ÷ output, output ÷ input, work in ÷ out, work in × out, Which one of the following is an example of work input?, trying to move box, doing homework, watching TV, throwing ball, A quantity which measures the rate of work output to work input is called., mechanical efficiency, mechanical work, mechanical force, mechanical energy, Which one of the following causes the machines not to be 100% efficient?, input force, output force, friction, power, An ideal machine is the machine that has a mechanical efficiency of, 10%, 20%, 50%, 100%, When the force applied by a machine on an object is increased, the distance, increases, doesn't change, decreases, duplicates, Which one of the following DOES NOT permit the mechanical efficiency of a machine to be 100%?, applied force, resulting force, power, friction, What is the mechanical efficiency of a machine if the amount of work output is 30 J and work input is 100 J?, 100%, 60%, 30%, 30 J, _____ is the number of times the machine multiplies force., efficiency, mechanical advantage, perpetual motion, none, Which class of a lever always changes the direction of the input force?, first class, second class, third class, all, Which type of a lever always has a mechanical advantage of less than one?, first class, second class, third class, all, Which simple machine describes a faucet?, pulley, wedge, wheel and axle, screw, An inclined plane has a length of 8 meters, and a height of 2 meters. What is the mechanical advantage?, 8, 16, 1, 4, Which one of the following is a second class lever?, see-saw, bottle opener, hammer, all, What is the mechanical advantage of the wheel and axle if the radius of the wheel is 15 cm and the radius of the axle is 3 cm?, 5 cm, 5, 45, 18, Use this diagram to answer this question; the mechanical advantage is..., less than one, greater than one, equal to one, not enough info, In the diagram of item 309, what is the type of the lever?, first-class lever, second-class lever, third-class lever, not enough info, Which type of a pulley does not change the direction of the force?, fixed pulley, movable pulley, simple pulley, covalent pulley, Which type of a lever always has a mechanical advantage of greater than one?, first class, second class, third class, all, In which type of lever is the load between the input force and fulcrum?, first class, second class, third class, all, _____ change the direction of the force., fixed pulleys, movable pulleys, block and tackles, both B and C, What is the mechanical advantage of the fixed pulley?, 1, 2, 3, 4, What is the mechanical advantage of the movable pulley?, 1, 2, 3, 4, A simple machine that forms a knife is a..., lever, inclined plane, screw, wheel and axle, Which one of the following is a correct way to calculate the mechanical advantage of a wedge?, length ÷ thickness, length × thickness, thickness ÷ length, thickness × length, A pulley allows 100 N load to be lifted with an input force of 50 N. What is the mechanical advantage of the pulley, and what is the type of the pulley?, MA 0.5, fixed, MA 2, fixed, MA 0.5, movable, MA 2, movable

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