The distance xm travelled by a particle in time... - JAMB Physics 1997 Question
The distance xm travelled by a particle in time t seconds is described by the equation x = 10 + 12t2, Find the average speed of the particle between the time interval t = 2s and t = 5s
A
60 ms-1
B
72 ms-1
C
84 ms-1
D
108 ms-1
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Correct Option: B
speed = (\frac{dx}{dt})
(\frac{dx}{dt}) = 10 + 12t2
(\frac{dx}{dt}) = 24t
(\frac{dx}{dt}) =24 x 3
(\frac{dx}{dt}) = 72 ms-1
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