A) 50 J
B) 40 J
C) 20 J
D) 10 J
Correct Answer: D
Solution :
Initial K.E. of the body = \[\frac{1}{2}m{{v}^{2}}=\frac{1}{2}\times 25\times 4=50\,\,J\] Work done against resistive force = Area between F-x graph = \[\frac{1}{2}\times 4\times 20=40J\] Final K.E. = Initial K.E. ? Work done against resistive force =\[50-40=10\,\,J\]
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