A) 500 J
B) 5000 J
C) 3750 J
D) 475 J
Correct Answer: C
Solution :
Key Idea: Work done in overcoming the resistance of air is equal to change in kinetic energy. Kinetic energy acquired by the body of mass m due to velocity v is \[{{E}_{q}}=2{{E}_{a}}\] Change in kinetic energy \[{{E}_{a}}=2{{E}_{q}}\] \[{{E}_{q}}=3{{E}_{a}}\] \[I-D,II-C,III-A,IV-B\] \[I-C,II-D,III-A,IV-B\] This change in kinetic energy is equal to the work done in overcoming the resistance.You need to login to perform this action.
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