Physics Crossword
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
                                                      
 
 
Down: 1) Output force / Input force2) Work output/work input x 100%3) Machines do not increase the work you put into them. The work that comes out of a machine can never be greater than the work that goes into the machine.6) Any device that helps people do work Across: 4) To reduce friction5) Comparison of work output to work input.7) You can improve the efficiency of a bike by riding it on the street instead of in the grass. Another example would be riding a skateboard on a bare floor intend of carpet.8) Machines transfer energy to objects on which they do work.(Including yourself.)9) The number of times a machine multiplies the effort force.10) It can multiply the size of the input force, but decrease the distance over which the force moves. It can multiply the input distance, but decrease the size of the force. Output distance is more than input distance. It can leave both force and distance unchanged, but change the direction in which the force moves.11) 1.work input= the work that goes into a machine; effort force exerted over distance. 2.Work output= The work that comes out of a machine; Output force exerted over a distance.12) 3000J/4000J=.75 x100%=75%
 

 

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