Calculate the work done

  • Thread starter mjcowley
  • Start date
  • #1
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Homework Statement



Two tugs pull a tanker. Each at a force 1400000N with one at an angle 14degrees west of north, the other 14degrees east of north. They pull the tanker 0.66km north.

Homework Equations



W=Fs

The Attempt at a Solution



I simply took the vector force of 1 tanker

1400000Cos(14) = 1358414N multiplied it by two for both tugs = 2716828

Therefore W (asked in 3 sig figs) = 2716828*0.66 = 1.79*10^6Nm

Unfortunately I'm told this is wrong :frown:

Appreciate any help!
 
Last edited:

Answers and Replies

  • #2
Doc Al
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You forgot the distance!
 
  • #3
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0

Homework Statement



Two tugs pull a tanker. Each at a force 1400000N with one at an angle 14degrees west of north, the other 14degrees east of north. They pull the tanker 0.66km north.

Homework Equations



W=Fs

The Attempt at a Solution



I simply took the vector force of 1 tanker

1400000Cos(14) = 1358414N multiplied it by two for both tugs = 2716828

Therefore W (asked in 3 sig figs) = 2716828*0.66 = 1.79*10^6Nm

Unfortunately I'm told this is wrong :frown:

Appreciate any help!

Look at your units.
 
  • #4
Doc Al
Mentor
44,953
1,220
You forgot the distance!
OK... you put in the distance (good!), but the distance is measured in km, not meters.
 
  • #5
2
0
Look at your units.
Good ol MKS

Thanks for that :)
 

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