# Questions from SolvingPhysics #1

Level pending

SolvingPhysics

Determine the absolute value of the velocity of a particle at time t=2s if the particle moves according to the law $$\displaystyle r=\alpha { t }^{ 2 }\hat { i } +\beta (\sin { \pi t } )\hat { j }$$, with $$\displaystyle \alpha =2{ m }/{ { s }^{ 2 } }$$ and $$\displaystyle \beta =3m$$.

[Answer in S.I units and using correct methods of approximation]

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