I got these two problems wrong on a test today, and its been driving me

1. A skier is at the top of a slope inclined at 10.5 degrees. The μ of the slope is 0.0750, as is the μ of the flat ground at the end of the slope. The slope is 200m in length. Starting from rest at the top, what is his speed at the bottom of the hill and how far from the bottom of the hill will he finally come to a stop?

2. A 700N man is bungee jumping from a bridge 36 meters above a river. The bungee cord is 25m long unstretched. In order to safely jump, he must stop his descent when he is 4m above the river. What is the 'k' (stretchability in N/m) value of the bungee cord?

*nuts*. I have pages of test work done out and I can't come up with anything right. Can anyone offer some insight?1. A skier is at the top of a slope inclined at 10.5 degrees. The μ of the slope is 0.0750, as is the μ of the flat ground at the end of the slope. The slope is 200m in length. Starting from rest at the top, what is his speed at the bottom of the hill and how far from the bottom of the hill will he finally come to a stop?

2. A 700N man is bungee jumping from a bridge 36 meters above a river. The bungee cord is 25m long unstretched. In order to safely jump, he must stop his descent when he is 4m above the river. What is the 'k' (stretchability in N/m) value of the bungee cord?

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