A 10-Kg Object Is Dropped from Rest

question 45

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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