cyclistdistancetimeworkpower5 km5 kmslowfastequalequallessmorePowerWork and PowerThe amount of work that is accomplished is not related to time. For instance, during a 5 km bike ride, one person may pedal slowly, while another person may pedal quickly. In both cases, an equal amount of work is done. However, unlike work, power is affected by time. In this example, the more powerful cyclist is the one who pedals faster and arrives at the destination more quickly.Definition of PowerPower is the rate at which work is done. A lawn mower that completes a job in 10 minutes is more powerful than a lawn mower that takes 30 minutes to complete the same job. Over the time period of an hour, the more powerful lawn mower can mow six lawns, while the less powerful mower can only mow two.10 minutes30 minutesCalculating PowerPower is calculated by dividing the amount of work done by the amount of time it takes to do the work. Knowing that work equals force times distance, you can rewrite the equation as force times distance divided by time. 10152025303540455055forcedistancetime 240 Newtons240 N x 10 m8 s2400 N m8 spower == = 300 N m/s or 300 joules/samount of worktimepower =force x distancework =© Copyright NewPath Learning. All Rights Reserved. 94-4455Visit www.newpathlearning.com for Online Learning Resources.Let’s calculate the power of a football player that uses 240 Newtons (N) to move the training equipment 10 meters in 8 seconds. Using the equation for power to solve this problem, we learn that the power is equal to 300 Newton meters per second, or 300 joules per second (1 Newton meter = 1 joule).cyclistttttttttttttdistttttttttaaaaaaaaaaaaaaannnnnnnnnnnnnnnnncccccccccceeeeeeeeeeeeettttttttttttimmmmmmmmmeeeeeeeeeeeeeeeewwwwwwwwwwooooooooooooorrrrrrrrrrkpppppppppppooooooooooooooowwwwwwwwwwwwwwwwer5 km55555555555555 kkkkkkkkkkkkkmmmmmmmmmmmmsssssslllllllllooooooowwwwwwffffffffffffffffffaaaaaaaaaaaaaaassssssssssttttttttttttttequaaaaaaaaaaleeeeeqqqqqqqqqqqqqqqqquuuuuuuuuuuuuuuallessssssssssmoreThe amount of work that is accomplished is not relatedto time. For instance, during a 5 km bike ride, one person may pedal slowly, while another person may pedal quickly. In both cases, an equal amount of work is done. However, unlike work, power is affected by time. In this example, the more powerful cyclist is the one who pedals faster and arrives at the destination more quickly.Powerrrrrrrrrrrr iiiiiiiiiiiiiisssssssss ttttttttttttttthhhhhhhhhhhhhhhhhhheeeeeeeee rrrrrrrrrrate at which work is done. A lawn mmmmmmmmmmmmmmoooooooooooooooowwwwwwwwwwwwwwwwwwweerrrrrrrrr tttttttttttttttttthhhhhhhhhhhhhhhaaaaaaaat completes a job in 10 minnnnnnnnnnnuuuuuuuuuuuuuuuutttttttttttttttteeeeeeeeeeeeessssssssssss is mooooooooooorrrrrrrrrrrrrrreeeeeeeeee ppppppowerful than a lawn mmmmmmmmmmmmoooooooooooooooowwwwwwwwwwwwwwweeeeeeeeeeeeeerrrrrrrrrrr ttttttttthhhhhhhhhat tttaaaaaaaaaakkkkkkkkkkkkkkkes 30 minutes to complete tttttttttttttthhhhhhhhhhhhhhhhhhhhhhheeeeeeeeeeeeeee saaaaaaaaammmmmmmmmmmmmmmmmmmmmmeeeeeeeeee jjjjjjjjjjjjjoooooooooobbbbbbbbbbbbbbbbbbb..... OOOOOOOOOOOver the time period of an hhhhhhhhhhhhhhhhhhhhhhhhhoooooooouuuurrrrrrrrrrrrr,,,,,,,, tttttttttttttthhhhhhhhhhhhhhhhhhheeeeeeeeeeee mmore powerful lawn mower can mmmmmmmmmmmmoooooooowwwwwwwwwwwwwwwwwwwwwwww ssssssssix lawns, while the less powerful mmmmmmmmooooooooooooooowwwwwwwwwwwwwwwwwwwweeeeeerrrrr cccccccccccccaaaaaan only mow two.Power is calculated by dividing the ammmmmmmmmooooooooooooooouuuuuuuuuuuuuunnnnnnnnnnnnnnnt oooooofffffffffffff wwwwwwwwwwwwwwwwwooooooooork ddddddddddddooone bbbbbbbbbbbbbbbyyyyyyyyyyyyyyyyy the ammmmmmmmmmmooooooouuuuuuuuuuunnnnnnnnnnnnnnnt of time it takes to do the work. Knowinggggggggggg tttttthhhhhhhhhhhhhhhhhhaaaaaaaaaaaaaaattttttt wwwwwwwwwwworkkkkkkkkkkkkkkkk eeeeeeeeeeeeeeeqqqualssssssssssss ffffffffffffffffffffooooooooooorrrrrrrrrrce timessssssssss distance, you can rewrite tttthhhhhhhhhhhhheeeeeeeeeee eeeeeeeeeeeeeqqqqqqqqqqqqqqqqqqqquuuuuuuuuuuuuuuuuaaaaaaaaaaaaaaaatttttttttttiiiiiiiiiiiiioooooooooooooonnnnnnnnnnnn aaaas ffforcccccccceeeeeeeeee tttttttttiiiiiiiiiimmmmmmmmmmmmmmmmmmmmeeeeeeeeeeeeeeeeesssssssssss disssssssssssssssstttttttttttttttaaaaaaaaaaaaaaaaaannnnnnnnnnnnnnnnnnnceeeeeeeeeeeeeeee dddddddddddddddddiiiiiiiiiviiiiiiiddddddddddddddddddeeeeeeeeeeeeeeedddddddddddd by time. 102025303540500555555555555ffffffffforceddistancettttttttttttttttiiiiiiiiiiiimmmmmmmmmmmmmmmmeeeeeeeeeeeeee 2222222222222222224444444444444444444444444000 Newtons222222222222244444444444444444444400000000000000 NNNNNNNNNNNNNNNN xxxxxxxxxxxxxxxxx 10 m888888888888888888888888 ssssssssssssss2222222222222222224444444444444444444444400000000000000000000000000000 NNNNNNNNNNNNNNNNNN m888888888888888888888 ssssssssssssssssppppppppppppppppppppoooooowwwwwwwwwwwwwweeeeeeeeeeeeerrrrrrrrrrrr ============== = 300 N m/s or 300 joules/samount of worktimepower =force x distancework =Let’s calculate the power offffffffffff aaaaaaaaaaa ffffffffffffffoooooooooooooooootbbbbbbbbbbbbbbbbaaaaaaaaaaaalllllllllllllllllllllll pppppppppppppppppplayer that uses 240 NNNNNNNNNeeeeeeeeeeewwwwwwwwwwwwwwwwwwttttttttttooooonnnnnnnnnnnnssssssssssssssss ((((((((((((((NNNNNN) to move the training equipment 10 meters in8 seconds. Using theeeeeeee eeeeeeeeeeeeeeeeeqqqqqqqqqqqqqqquuuuuuuuuuuuuuuuuuuaaaaation fffooorrrrrrrrrrr ppppppppppppppooooooooooooweerrrrrrrrrr ttttttttttttttooooooooooooooo sssssolve this problem, wwwwwwweeeeeeeeeeeeeeee lllllllllllllearn that the power is equal to 300 Newton meters per second, or 3000 jjjjjjjjjjjjjjjjjjoooooouuullllllllllleeeeees pppppppppppeeeeeeeeeeeeeeeeerrrrrrrrrrr secondddddddd (((((((((((((111111111111111 NNNNNNNNNNNNNNNNNNNNewwwwwwtttttttttttooooooooooon meter = 1 jouuuuuuuuuulllllllllllllllllleeeeeeeeeeeee)))))))))))).
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