A 3kg block is resting at the bottom of a ramp that is at a 37 degree angle with a coefficient of friction of .2. A spring at the bottom of the hill has a spring constant of 5000N/m. The block compresses the spring 8cm (so .08m) and is then released. The block slides up the ramp and then slides back down the ramp.(adsbygoogle = window.adsbygoogle || []).push({});

a. Find the velocity of the block as it starts to slide up the ramp.

I did this problem, and my teacher said it was right. V = 3.26m/s

b. Find the velocity of the block when it returns to the bottom of the ramp on the way back down.

I got 3.38 m/s, is this right?

Ff =16*2=3.2N 16-3.2=12.8 12.8=28l l=.711

WFf=Fd W=(3.2)(.711)=2.21(2)=4.55

16-4.55=11.45J KE=1/2m^2 11.45=.5(2)v^2 v=3.38 m/2

c. Find the amount that the block will compress the spring when it comes back down.

Is it asking how many joules or how many meters? I got .067m, is this right?

11.45=.5(5000)x^2 11.45=2500x^2

.00458=x^2 x=.067m

Note: This isn't homework. It's not a grade of any sort. I'm doing some practice problems from old worksheets to prepare for a test tomorrow. So I'm trying to understand how to do it, the concepts of it, not just what these answers are. I could care less.

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# Homework Help: Horizontal Spring Problem, just need it checked!

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