 # A spring S of force constant k=100 N/m. is fixed to the base of a 30 degree incline.A mass m=50g. is held against the free end of the spring,so that the spring is compressed by 0.1 metre.If the mass is now released,calculate the distance travelled by the mass up the incline.dont ignore friction. i tried using conservation of evergy theorem but i am not getting the solution.how should i start?

10 years ago

Always keep in mind that first u have to select a system before solving any question. then see if there are only internal forces or not and also those internal forces are conservative or not if there are only internal conservative forces then only u can apply conservation of energy.  If u applied energy conservation in this case then it wud be wrong bcoz friction is non conservative force.

*work energy theoram is always valid. u can apply it in case case.

10 years ago

Conservation of mechanical energy should not be made use of only if there is friction force doing work. Instead go for work energy theorem.