The distance(s) in metres travelled by a particle is related to time(t)in seconds by the equation of motion->S=10t+4t square.What is the initial velocity of the body?
(class 9)
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Answer:
u = 20t
Explanation:
According to the 2nd equation of motion
S = ut+1/2at²
where u = ds/dt
From the equation S=10t²-4t
u = ds/dt = 20t
a = d²S/dt² = 20
⇒ S = (20t)t + 1/2(20)t² = 30t²
Initial velocity 'u' = 20t
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