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A force is represented by F = ax 2 + 2 1 bt Where x = distance and t = time. The dimensions of b 2 /a are :

1. [ML 3 T –3 ]
2. [ML 2 T –3 ]
3. [ML –1 T –1 ]
4. [MLT –2 ]

Correct answer: [ML 3 T –3 ]

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