A) 5005 J
B) 3755 J
C) 3750 J
D) \[17.5\] J
Correct Answer: C
Solution :
From equation of motion, \[{{v}^{2}}=\text{ }{{u}^{2}}-\]2as \[{{\left( 500 \right)}^{2}}={{\left( 1000 \right)}^{2}}-2\times a\times s\] \[s=\frac{{{(1000)}^{2}}-{{(500)}^{2}}}{2a}=\frac{375000}{a}\] \[\therefore \] Work done against air resistance, \[W=Fs=ma\,\,\times s\] \[=\frac{10}{1000}a\times \frac{375000}{a}=\,3750\,J\]You need to login to perform this action.
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