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Basic force question(should be too easy)

  • Thread starter aaquib
  • Start date
10
0
1. Homework Statement
A supertanker of mass 1.0 X 10^8 travels 3.5km, reaching a speed of 4.1km/h from rest. What was the magnitude of the unbalanced force acting on it?


2. The attempt at a solution

I got the acceleration(2.4m/s^2), but how do I fit this into the equation? The answer is 18529.5N, but I have no idea how they got that.
 

Answers and Replies

458
0
[tex]W=\Delta KE[/tex]
 
10
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[tex]W=\Delta KE[/tex]
Ive only taken physics for 2 months in my life, so please excuse me, but what the heck is W and what the heck is KE?
 
458
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W is work, KE is the kinetic energy.
 
10
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W is work, KE is the kinetic energy.
Im not used to using that formula. I usually use force=mass X acceleration.
 
458
0
Well, your acceleration is wrong, possibly due to the fact you forgot to convert units.
 

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