A particle moving with a uniform acceleration along a straight line covers distances a and b in successive intervals of p and q second. The acceleration of the particle is
A
pq(p+q)2(bp−aq)
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B
2(aq−bp)pq(p−q)
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C
(bp−aq)pq(p−q)
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D
2(bp−aq)pq(p+q)
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Solution
The correct option is B2(aq−bp)pq(p−q) According to the given problem, when s=a,t=p ∴s=ut+12ct2 (where c= acceleration)
or a=up+cp22 ...(1)
For s=b,t=q b=uq+cq22 ...(2)
Now by multiplying (1×q) and (2×p) and subtracting both the equations we get,
c=2(aq−bp)pq(p−q)
Hence, the correct answer is option (b).