The distance travelled by a particle in a straight line motion is directly proportional to t1/2, where t is the time elapsed. What is the nature of motion?
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a
Increasing acceleration
b
Decreasing acceleration
c
Increasing retardation
d
Decreasing retardation
answer is D.
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Detailed Solution
s=kt1/2⇒a=d2sdt2=−14kt−3/2 As t increases, retardation decreases.