Completion
Complete each statement.
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1.
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Definition: The transfer of energy to an object by the applicatioin of a force that causes the object to move in the direction of the force.
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2.
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Are you doing “work” when an object is not moving?
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3.
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What is the formula to determine “WORK?”
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4.
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In the formula for work, what is the unit of measurement for FORCE?
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5.
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What is the SI (Standard International) unit for WORK?
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6.
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One Newton lifted one meter = how many units of work?
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7.
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If you are given the mass of an object and the distance it is moved, what would the resulting formula be for WORK?
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8.
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You are standing in the gym holding a set of barbells above your head. Are you doing any work?
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9.
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Three children are struggling to move a large rock. After much effort, they manage to move the rock one centimeter. Have they done any work?
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10.
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A machine takes 50 units of work to lift an 8 Newton rock 5 meters. How many units of work are expended as heat?
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11.
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Definition: A quantity that measures the rate at which work is done or energy is transformed.
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12.
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Give the formula for power.
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13.
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Power is measured in what unit?
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14.
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One unit of power is the amount needed to do .....
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15.
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What is the formula for POWER if a word problem includes FORCE, DISTANCE, and TIME?
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16.
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What is the unit of measurement for WORK?
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17.
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Would your power output increase or decrease if you walked up a set of stairs faster?
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18.
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Would your power output increase or decrease if you carried a set of books weighing 20N up the stairs in the same amount of time as you went up the stairs without the books?
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19.
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While rowing across a lake during a race, John does 3960 joules of work in 60 seconds. What is his power output?
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20.
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Definition: A quantity that expresses how much a machine multiplies force or distance.
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21.
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Can an inclined plane have a mechanical advantage of less than one?
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22.
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What is the mechanical advantage of a single fixed pulley?
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23.
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What is the mechanical advantage of a pulley system with 4 supporting strands?
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24.
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What is the mechanical advantage of a single MOVABLE pulley?
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25.
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In many of our labs we used Force Produced (FP) and Force Applied (FA) to derive Mechanical Advantage (MA). What is the formula?
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26.
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Is it any advantage to use a machine that has a mechanical advantage of less than one?
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27.
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A ramp at ANY ANGLE must have a mechanical advantage greater than what?
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28.
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You have access to a short, steep ramp and a long, gradual ramp. Compare the WORK done by the two ramp systems.
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29.
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In our levers lab it was suggested that it is possible to lift a car with your little finger. Explain the lever system that would make this possible.
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30.
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List the 6 simple machines.
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31.
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Give an example of a first class lever.
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32.
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Give an example of a second class lever.
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33.
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Give an example of a third class lever.
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34.
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What is the mechanical advantage of a single fixed pulley?
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35.
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What is the mechanical advantage of a pulley system with 3 supporting strands?
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36.
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Definition: Made up of two or more simple machines.
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37.
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Name a compound machine.
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38.
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How does an inclined plane change the force required to do WORK?
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39.
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How does a pulley system change the force required to do WORK?
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40.
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Does a single fixed pulley do the same amount of work as a double fixed and double movable system with 4 supporting strands?
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41.
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Definition: The capacity to do work.
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42.
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Definition: Energy that an object has because of its position or configuration.
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43.
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Definition: Energy of an object due to the object’s motion.
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44.
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What is the formula for determining potential energy?
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45.
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What is the formula for determining KINETIC ENERGY?
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46.
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What type of energy is found in a match before it is struck?
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47.
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Definition: The amount of work an object can do because of the object’s kinetic and potential energies.
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48.
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What organism is able to turn light energy into chemical energy?
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49.
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When wood is burned, what type of energy is released?
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50.
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Why are water storage tanks placed on hilltops or on towers?
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51.
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Definition: Energy cannot be created or destroyed
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52.
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If the Law of Conservation of Energy is true, how is it possible for a girl’s second bounce on a trampoline to be higher than the first?
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53.
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A tennis ball is allowed to bounce on a table top. Each bounce is lower and lower. Why aren’t all the bounces the same height?
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54.
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Definition: A machine that keeps on going forever without any additional input of energy.
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55.
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Definition: A quantity, usually expressed as a percentage, that ensures the ration of useful work output to work input.
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56.
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What is the formula for EFFICIENCY?
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57.
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Efficiency is measured in what unit?
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58.
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In an experiment you roll a ball down a ramp to measure PE and KE. You find the number for KE to be slightly less than for PE. Did you do the experiment incorrectly?
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59.
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Definition: When a force causes an object to change its motion or position.
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60.
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Definition: The rate at which work is done.
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61.
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All levers have one thing in common. What is it?
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62.
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How many simple machines are contained in a compound machine?
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63.
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Kinetic energy is dependent on two factors. What are they?
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64.
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Can energy readily change from one form to another?
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65.
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Can energy be created or destroyed?
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66.
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Can a machine do more work than the amount of work required to operate it?
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