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October 24, 2014

Homework Help: physics

Posted by autumn on Wednesday, December 2, 2009 at 10:12pm.

Let's pretend the Qs are actual numbers.

So an unstretched, mass less spring constant Q3 N/m and length Q10 meters is attached between a wall and a mass of Q5 kg. The coefficient of both static and kinetic friction between the mass and the table is Q13. A constant force F is then applied to the resting mass until the mass has moved a distance of S meters, by which time the mass is moving a Q8 m/s. what is the force F in newtons?

i don't know if this is right but i tried it this way:
F= Force of friction+ force of Spring+ net force
F= U(coefficient of friction)mg+kx+ma
but what is x in hooke's law Q 10 or S?
I don't use amplitude, do i have to? What would that be, S, Q10 or a number i would have to solve for??

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