A Simple Mechanics Problem: Help with Calculating Forces and Energy

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The discussion revolves around calculating forces and energy in a mechanics problem involving a spring and a block on an incline. The user has calculated the force exerted by the spring as 140N and the work done by the spring as 7J, questioning the correct distance to use for further calculations. There is confusion about whether to use the compressed distance of 0.1m or the total distance of 6.6m for determining work and energy. Clarification is sought on finding the maximum kinetic and potential energy of the block, particularly regarding the spring's work calculation. The thread highlights the importance of understanding the relationship between distance, force, and energy in mechanics.
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can anyone help me on the second question?
i found the part a is
1400 * 0.1 m = 140N,
part b is 6.6m, part c is 14J, part d is
but i don't know how to do the last two part... help please!
is this correct?
w=mgcos60 x 6.6m = 6.468 J..
i don't know which distance should i use~
0.1m or 6.6m?
0.1m is form the spring and 6.6 is the total distance..
how to find the maximum kinetic and potential energy of the block?
 
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Are you certain that the distance up the incline and the work by the spring that you calculated are right?

For the work by the spring... won't it just be (1/2)kx^2 = (1/2)(1400)(0.1)^2 = 7J ?

I'm assuming the spring is compressed at 0.1m and then released?
 

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