The displacement, velocity and acceleration of a particle have the same relationship in vector form as when motion is along a straight line:

Integration and differentiation are done in a natural way, with the direction vectors
and
being constant vectors.
Example:
The position vector,
of a particle at time
is given by
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Find expressions for the acceleration and velocity of the particle.
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Example
The acceleration vector,
of a particle at time
is given by
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Find expressions for the velocity
and acceleration
of the particle, if
and
at![]()
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When![]()
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When![]()