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Q.

A body is moving with a uniform acceleration covers 40m in the first 4 sec and 120m in next 4 sec.  Its initial velocity and acceleration are

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a

0,        5m/s²

b

4m/s,  5m/s²

c

4m/s,  0

d

5m/s,  4m/s²

answer is A.

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Detailed Solution

A to B  :                40  =  U ×4+12(a)42                                              40   =   4U+8a -------------(1)A to C :                 40+120  = U×8+12 a ×82                                            160  =  8U+32 a -----------(2) Solving (1) and (2)  ,  we get                                                 U = 0  and a  =  5m/s²
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