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### 23 Cards in this Set

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 What is Mechanical Advantage? How helpful a machine is. This tells you how many times the machine multiplies the effort force What are the 6 simple machines? 1)Inclined Plane 2)Wedge 3)Screw 4)Wheel and Axle 5)Pulley 6)Lever What is a compound machine? Any combination of 2 or more simple machines Formula for Work Work = Force x Distance Formula for Power Power = Work/Time Formula for Mechanical Advantage MA = FR/FE In the labs for this unit, you used an instrument to measure force. What was it called? Spring Scale What is the unit for Work? Joule (J) What is the unit for Force? Newton (N) What is the unit for Power Watt (W) What 2 simple machines make up a wheelbarrow? 1)Wheel & Axle 2)2nd Class Lever What are 2 simple machines that make up a bicycle 1)Wheel and Axle 2)1st Class Levers(pedals) 3)Pulleys (Gears) What 2 simple machines make up a shovel? 1)Wedge 2)3rd Class Lever What is an example of a 1st Class Lever? Scissors, SeeSaw, some Catapults, Crowbar, etc. What is an example of a 2nd Class Lever? Wheelbarrow, Stapler, etc. What is an example of a 3rd Class Lever? Fishing Pole, Shovel, Broom, Rake, Pitch Fork, Hockey Stick, etc. This simple machine is an inclined plane wrapped around an axis to make a spiral. Screw This simple machine is an inclined plane that moves. It is usually sharp and is used to cut into things. Wedge This simple machine is a flat slanted surface that makes it easier to raise heavy loads. Inclined Plane This simple machine is made up of 2 circular objects of different sizes Wheel and Axle True or False: In a pulley system, the MA increases as you add more pulleys True This simple machine is a rope, belt, or chain wrapped around a grooved wheel Pulley This is the force that all machines work to overcome. (This force usually slows an object down.) Friction