A 1700kg car travelling at a speed of 40ms skids to the, Ask an Expert

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Q. A bungee jumper, who's mass is 86.0 kg, jumps from a tall platform. After reaching his lowest point, he continues to oscillate up and down, reaching low point two more times in 9.50s. Ignore air resistance and assuming that the bungee cord is an ideal spring, find out its spring constant.

Q. A 1700kg car travelling at a speed of 40m/s skids to the halt on wet concrete where f_k = 0.3. How long are the skid marks?

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