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