Kieran Takes Off from Rest Down a 50 M High,10°

question 72

Multiple Choice

Kieran takes off from rest down a 50 m high,10° slope on his jet-powered skis.The skis have a thrust of 280 N parallel to the surface of the slope.The combined mass of skis and Kieran is 50 kg (the fuel mass is negligible) .Kieran's speed at the bottom is 40 m/s.What is the coefficient of kinetic friction of his skis on snow?

• A) 0.47
• B) 0.58
• C) 0.23
• D) 0.29

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Definitions:

Unsystematic Risk

The risk associated with a specific company or industry, which can be mitigated through diversification, unlike systematic risk.

Covariance Risk

The degree to which two assets' returns move in relation to each other, indicating the risk inherent in holding the assets together in a portfolio.

Systematic Risk

The risk inherent to the entire market or market segment, often referred to as market risk, which cannot be eliminated through diversification.

Coefficient of Variation Risk

A statistical measure used to assess the risk of an investment by calculating the ratio of the standard deviation to the mean return, indicating variability in relation to the expected return.