A Helicopter Descends Vertically to Land with a Speed of 4.0

question 3

Multiple Choice

A helicopter descends vertically to land with a speed of 4.0 m/s.If the shock absorbers have an initial length of 0.50 m,they compress to 79% of their original length and the air in the tires absorbs 21% of the initial energy as heat,what is the ratio of the spring constant to the helicopter's mass? Assume one landing gear in the craft.

• A)1.1 kN/kg-m
• B)1.1 N/kg-m
• C)11 N/kg-m
• D)0.11 kN/kg-m

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