A 10-Kg Object Is Dropped from Rest

question 9

Multiple Choice

A 10-kg object is dropped from rest.After falling a distance of 50 m,it has a speed of 26 m/s.What is the change in mechanical energy caused by the dissipative (air) resistive force on the object during this descent?

• A)-1.3 kJ
• B)-1.5 kJ
• C)-1.8 kJ
• D)-2.0 kJ
• E)-2.3 kJ

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