1.

The relation between time and distance is \[t=\alpha {{x}^{2}}+\beta x\], where \[\alpha \] and \[\beta \] are constants. The retardation is               [NCERT 1982; AIEEE 2005]

A.             \[2\alpha {{v}^{3}}\]          
B.             \[2\beta {{v}^{3}}\]
C.             \[2\alpha \beta {{v}^{3}}\]  
D.             \[2{{\beta }^{2}}{{v}^{3}}\]
Answer» B.             \[2\beta {{v}^{3}}\]


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