particle is moving in a circular path. The acceleration and momen… - Vidyadip

MCQ

particle is moving in a circular path. The acceleration and momentum of the particle at a certain moment are $\vec a\, = \,(4\hat i + 3\hat j)\,\,m/{s^2}$ and $\vec P\, = \,(8\hat i\, - \,6\hat j)\,kg\, - \,m/s$ . The motion of the particle is

A
Uniform circular motion
✓
accelerated circular motion
C
decelerated circular motion
D
We cannot say anything with $\vec a$ and $\vec p$ only

✓

Answer

Correct option: B.

accelerated circular motion

b
Angle between acceleration and momentum is less than $90^o$. So acceleration has two component one is $ \bot $ ar to momentum (centripetal) and another is parallel to momentum (tangential) which increases speed.

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