(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 50 g ice cube can slide without friction up and down a 30 degree slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 10 cm. The spring constant is 25 N/m. When the ice cube is released, what total distance will it travel up the slope before reversing direction?

b)The ice cube is replaced by a 50 g plastic cube whose coefficient of kinetic friction is 0.20. How far will the plastic cube travel up the slope?

2. Relevant equations

1/2mv^2

1/2kx^2

3. The attempt at a solution

I'm not a fan of incline problems and I honestly have no clue on how to start this question. Can someone please guide me through it and help me come up with a set of steps that will help me through future incline problems?

1. The problem statement, all variables and given/known data

The spring shown in the figure is compressed 50 cm and used to launch a 100 kg physics student. The track is frictionless until it starts up the incline. The student's coefficient of kinetic friction on the 30 degree incline is 0.15.

a)What is the student's speed just after losing contact with the spring?

b)How far up the incline does the student go?

http://img530.imageshack.us/img530/6145/knightfigure1154nl2.th.jpg [Broken]

2. Relevant equations

1/2kx^2

1/2mv^2

3. The attempt at a solution

I got part a) which was 14.1m/s using the law of conservation of energy, but as I mentioned before, I always get stuck on incline questions.

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# Homework Help: Incline and Springs

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