A) 2000 W
B) 22500 W
C) 5000 W
D) 2250 W
Correct Answer: B
Solution :
Velocity, \[v=\text{ }u+at\] \[\Rightarrow \] \[a=\frac{15-0}{5}=3m/{{s}^{2}}\] \[\left( \because v=54\,km/h\,\,=\frac{54\,\,\times \,\,5}{18}=15\,m/s \right)\] Hence, \[{{P}_{av}}=\frac{1}{2}Fv=\frac{1}{2}mav\] \[=\frac{1}{2}\times 1000\times 3\times 15=22500\,\,W\]
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