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Question

A particle is at rest at t = 0. If acceleration of the particle is given as a=sinπt+cosπt in unit then the maximum speed of the particle is

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Solution

Given Data:

Acceleartion of particle, a=sinπt+cosπt

As we know rate of change of velocity is known as acceleration so,

dvdt=sinπt+cosπt

dv=(sinπt+cosπt)dt

∫dv=∫t0(sinπt+cosπt)dt

v=1π[(−cosπt)+(sinπt)]t0

v=1π[(−cosπt)+(sinπt)]−1π[−cos(π×0)+sin(π×0)]

v=sinπt−cosπtπ−1π(−1+0)

v=sinπt−cosπt+1π

v=1π{1+√2(sinπt1√2−cosπt1√2)}

v=1π{1+√2sin(πt−π4)}

vmax=1π(1+√2)=√2+1πunit



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