What is Work?work is donework is doneno work is doneWork occurs when a force is exerted on an object and causes the object to move. The force exerted and the movement of the object must be in the same direction to be considered work. Work & Motion If force is exerted and an object does not move, then work does not occur. For example, if you try to push a very heavy object, but the object does not move, then work is not done. Work and Direction If the force exerted is in a different direction than the movement of an object, then work does not occur. When you pick up a grocery bag, the exerted force and movement of the grocery bag are in the same direction, so work is done. However, when you carry a grocery bag, the bag moves in a horizontal direction as you walk. Carrying the grocery bag is not considered work. forceCalculating WorkThe equation for work is force times distance. For example, if you use 5 Newtons of force to push a cart 10 meters, then the amount of work is equal to 50 Newton meters. If the cart becomes heavier and you need to exert 10 Newtons of force to move it the same distance, then the amount of work is equal to 100 Newton meters.5 Newtons10 meters50 Newton meters10 Newtons10 meters100 Newton meterswork = force x distance© Copyright NewPath Learning. All Rights Reserved. 94-4454Visit www.newpathlearning.com for Online Learning Resources.A Joule is a Unit of WorkA Newton meter is also known as a joule. One joule is equal to the amount of work that is exerted when one Newton is exerted to move an object one meter.1 Newton1 meter1 jouleforcemotionforcemotionthe rock does not move – no work is donework is donewwwwwwwwwwwwwworkkkkkk iiiiiiiiiiissssssssssssss dddooooooooooooooonnnnnnnnnnnnnneeeeeeeeeeeeeeeennnnnnnnnnnnooooooooooooo wwwwwwwwwwwooooooooooooorrrrrrrrrrkkkkkkkkkkkkkkkkk iiiiiiiiiiiiissssssssssss dddddddddddddddooooooooooooonnnnnnnnnnnneeeeeeeeeWork occurs when a force is exerted on an object and causes the object to move. The force exerted and the movement of the object must be in the same direction to be considered work. If force is exerted and an object does not move, then work does not occur. tFor example, if you try to push a very heavy object, but the object does nooooooootttttttttttt move, then work is not done. IIIIIffffffffff ttttttttttttttthhhhhhhhhhhhhhhhhhheeeeeeeeeee force exerted is in a different dddddddddddddddddiiiiiiiiiiiiirrrrrrrrrreeeeeeeeeeeeeccccccccccccccccttttttttttttttttiiiiiiiiiiiion than the movement of an objjjjjjjject, then work does not occur. WWWWWWWWWWWWWWWWWWWhhhhhhhhhhhhhhhen you pick up a grocery bag, the exerted force and movement of the grocery bag are in the same direction, so work is done. However, when you carry a grocery bag, the bag moves in a horizontal direction as you walk. Carrying the grocery bag is notconsidered work. forceThe equation foooooooooooorrrrrrrrrrr wwwwwwwwwwwoooooooooooooooorrrrrk is fffffffffooooooooooorrrrrrrrrrrrrrrcccccccccccccccceeeeeeeeee tiiiiiiimmmmmmmmmmmmmmmmmmmeeeeeeeeeeeeeeeessss distance.. FFFFFFFFFFFFFFFoooooooooooor eeeeeeeeeeexxxxxxxxxxxxxxxxaaaaaaaaaaaaammmppppppppppppppppppppllllllllllllllllleeeeeeeeeeeeeeee,,,,,,,, if you use 5 Newtons offffffff fffffffffffffforrccccccccccceeeeeeeeeee toooooooooooooooo ppppppppppppppuuuuuuuuuuuuussssssssh a ccaaaaaaaaaaaarrrrrrrrrrrrrrttttttttttttt 11110 mmmmmmmmmmmmmmmmmmmmmeeeeeeeeeeeeeetttters, then ttttttttthhhhhhhhhhhhhhhheeeeeeeeeeeeeeee aaaaaammmmmmmmmmmmmmmmoooooooooooooooooouuuuuuuuuuuuuuunt of workis equal to 555555500000000000000000 NNNeeeeeeeeeeeeeewwwwwwwwwwwwwttttttttttttttoooooooooooooooonnnnnnnnn mmmmmmmmmmmmmmmetttttttttteeeeeeeeeerrrrrrrrrrrrrrrsssssssssssss... If thhhhhhhhhhhhhhheeeeeeeeeeeeee cccccccccccccaaaaaart bbbbbbbbbbbbbbbbeeeeeeeeeeeeeeeecccccccccomes heavvvvvvviiiiiiiiiieeeeeeeeeerrrrrrrrrr and you need to exxxxxxeeeeeeeeeeeeerrrrrrt 1111111111100000000000000000 NNNNNNNNNNNNNNNNNNNeeeeeeewwwwwwwwwwwwwwwwwwwtttttttttttttonnnnnsssssssss oooooooooooooooofffffff ffffffffffoooooooooooooorrrrrrrrrrrrrrccccccccccccccceeeeeeeee to mmmmmmmmmmmmooooooooooooovvvvvvvvvvvvvvvvvee iitttttttt tttttttttttttthhhhhhhhhhhhhhhhhheeeeeeee same distance, then the amouuuuuuuuuuuuunnnnnnnnnt ooooooooooooooooffffffffffffffff wwwwwwwwwwwwwwwwwwwwooooooooooorrrrrrrrrrrkkkkkkkkkkkkkk issss equallllllllll tttttttttttooooooooooooo 111111111110000000000000000 NNNNNNNNNNNNNNNNNNNNNeeeeeewtooooonnnnnnnnnnnnnnn mmmmmmmmmmmmmmmmettteeeeeeeeerrrrrrrrrrrrrrrrsssssssssss.5 Newtons10 meters50 Newton meters10 Newtons10 meters100 Newton metersAAAAAAAAAAAAAAAAAAAAAA NNNNNNNNNNNNNewton meter is also knowwwwwwwwwwwwwwwnnnnnnnnnnnnnn as a joule. One jouleiiiiiiiiiiiiissssssssssssss eeeeeeeeeeeeeqqqqqqqqqqqqqqqqqquuuuuuuuuuuual to the amount of wwwwwwwwwwwwwwoork that is exerted when onnnnnnnnneeeeeeeeeeeeee NNNNNNNNNNewton is exerted to mmmmmmmmmmmmmmmmmove an object one meter.1 Newton1 meterforcemotionffffffffffffffffffooooooooooooooooorrrrrrrrrrrcccccccccccccccccceeeeeeeeemottttttttiiiiiiiiiiioooooooooooooooonnnnnnnthe rock does che rock dnot move – not moveno work is doneno work is
< Page 2 | Page 4 >