The coordinates of a bird flying in the xy-plane are given by x(t)=αt and y(t)=3.0m−βt2, where α=2.4m/s and β=1.2m/s2.
a)Let the direction be the angle, that the vector makes with the +x-axis measured counterclockwise. Calculate the direction of the bird's velocity at t=2.0s.Express your answer in degrees using two significant figures.
b)Calculate the magnitude of the bird's acceleration at t=2.0s.Express your answer using two significant figures.

Question

05-10-2014
Physics

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The coordinates of a bird flying in the xy-plane are given by x(t)=αt and y(t)=3.0m−βt2, where α=2.4m/s and β=1.2m/s2.
a)Let the direction be the angle, that the vector makes with the +x-axis measured counterclockwise. Calculate the direction of the bird's velocity at t=2.0s.Express your answer in degrees using two significant figures.
b)Calculate the magnitude of the bird's acceleration at t=2.0s.Express your answer using two significant figures.

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