Velocity and acceleration vectors of a particle moving \( \mathrm{P...

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Velocity and acceleration vectors of a particle moving
\( \mathrm{P} \) on a circular path are shown here. At the instant

W shown
(1) The speed of the particle must be decreasing
(2) Acceleration of particle must be increasing in magnitude
(3) Dot product of \( \vec{v} \) and \( \vec{a} \) is positive
(4) Magnitude of momentum of the particle must be increasing in magnitude
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