kindly help please.
A Block Of Mass 12 kg

Question

kindly help please. 
A Block Of Mass 12 kg

dominantvampire · Answer

a block of mass 12 kg is released from rest om a friction-less incline of the angle  theta=30 
below the block is a spring having spring constant 10^4 N/m. the block stops momentarily when it compresses the spring by 4 cm. how far does the block move down the incline  from its  rest position to this stopping point

dominantvampire · Answer

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dominantvampire · Answer

no body knows perhaps, sighs.

anonymous · Answer

do you know how to use energy conservation??

dominantvampire · Answer

yes.

dominantvampire · Answer

Ki+Ui=Kf+Uf ?

anonymous · Answer

yep... initial energy will be the potential energy of the block
and the final energy will be the spring extension..
can you relate?

anonymous · Answer

compression**

dominantvampire · Answer

the Ki is 0 and Uf would be zero as well i guess

anonymous · Answer

Uf would not be zero as the spring is compressed and is having potential energy
its like the GPE is getting converted to spring energy

anonymous · Answer

GPE is gravitational potential energy