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A body of mass 6 kg is under a force of 6 N which causes displacement in it given by \[S=\frac{t^2}{4}m\].The work done by the force in 2 s is-
Work = force × distance. Plug in your t=2s to solve for s, then multiply.

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Other answers:

w=6*s
@phi have a look
\[S=\frac{2^2}{4}=1\]
right @ajprincess and @phi
yup perfect:)
  • phi
yes. s is 1 meter force is 6 N work is 6 N-m
sure @phi
  • phi
of course N-m is a joule so 6 joules
but in google docs answer is other. https://docs.google.com/viewer?a=v&q=cache:iGC7itlY6hsJ:www.sakshieducation.com/(S(mlzd0s2wqyatcnayoccra055))/EAMCET%255CPB%255CPhysics%255CJr%2520Inter%2520Physics%255C01_04DYNAMICS.pdf+a+body+of+mass+6+kg+is+under+a+force+of+6N+which+causes+displacement+in+it+given+by+S%3Dt%5E2/4.The+work+done+by+the+force+in+2s+is&hl=en&gl=in&pid=bl&srcid=ADGEESgoWoRGthzMJxeS9CK9CeGLWz08eJHYO6rMwA9LPVp2eoDVW6dnxYNlEVi57PtQhxXGRXPuCy-GmKRzWmiYPhYrBcPxe7NRK3f2hJAadBMg3nvNTp9m4dfiUbMILYgDBsbEKgoP&sig=AHIEtbRq9vQXIj94aHgaiG1dn4VdMjL9hQ question no. 14
  • phi
Q14 does not say the force is 6 N.
it says 3J but you say 6J
  • phi
the question says "6 kg under a force that causes a displacement..." we need to find F, using F= ma we need a use d = 1/2 a t^2 we know d and t so we find a, then F and finally W = F d
  • phi
d (or s) in this case is 1 m t is 2 sec 1 = 1/2 a 2^2 a= 1/2 m/s^2 F= ma = 6*1/2 = 3 N W = F d = 3N * 1m = 3 N-m = 3 J
so my question is also same @phi
  • phi
your question says: mass 6 kg is under a force of 6 N ... you gave the force as 6 N so that is what I would use....
what do you mean? @phi
  • phi
Q14 requires that you find the force... Your 1st question may be inconsistent? i.e. 6 kg and 6 N don't mesh with the displacement?
oh!!
thnx..... @phi

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