A particle of unit mass is moving on a plane. Its trajectory, in polar coordinates, is given by r(t) = t2, (t), where f is time. The kinetic energy of the particle at time t = 2 is

A particle of unit mass is moving on a plane. Its trajectory, in polar

1.	A particle of unit mass is moving on a plane. Its trajectory, in polar coordinates, is given by r(t) = t², (t), where f is time. The kinetic energy of the particle at time t = 2 is
A.	4
B.	12
C.	16
D.	24
Answer» D. 24

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A particle of unit mass is moving on a plane. Its trajectory, in polar coordinates, is given by r(t) = t2, (t), where f is time. The kinetic energy of the particle at time t = 2 is

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A particle of unit mass is moving on a plane. Its trajectory, in polar coordinates, is given by r(t) = t², (t), where f is time. The kinetic energy of the particle at time t = 2 is