A) 21 J and 33 J respectively
B) 21 J and 15 J respectively
C) 42 J and 60 J respectively
D) 42 J and 30 J respectively
Correct Answer: D
Solution :
From figure Work done (W) = max \[{{W}_{4}}=2\left[ \frac{1}{2}\times 1\times 6+3\times 6 \right]\] = 42 J \[{{W}_{7}}=2\,[21+3-3-1\times 6]\]\[=30\,J\]
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