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PART - 1 CH - 3 Motion in a Plane — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsPART - 1 CH - 3 Motion in a Plane2 Marks
Question
Read each statement below carefully and state. with reasons, if it is true or false :
(a) The net acceleration of a particle in circular motion is always along the radius of the circle towards the centre.
(b) The velocity vector of a particle at a point is always along the tangent to the path of the particle at that point.
(c) The acceleration vector of a particle in uniform circular motion averaged over one cycle is a null vector.
✓

Answer

(a) False, because only in uniform circular motion (constant speed) the acceleration occurs along the radius and towards the center (centripetal acceleration).
(b) True, the velocity vector is always tangent to the path of motion.
(c) True, because in this case displacement is zero.

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