Ncert Exercises & Solutions

4.19 Read each statement below carefully and state, with reasons, if it is true or false :

(a) The net acceleration of a particle in a circular motion is always along the radius of the circle towards the center

(b) The velocity vector of a particle at a point is always along the tangent to the path of the particle at that point

NEETprep Answer:

(a) False, the net acceleration of a particle in circular motion is along the radius of the circle towards the centre only in uniform circular motion. In non-uniform circular motion, object acceleration has two components, one along the radius of the circle and one along the tangent at that point.

(b) True, because while leaving the circular path, the particle moves tangentially to the circular path.

(c) True, the direction of the acceleration vector in a uniform circular motion is directed towards the centre of the circular path. It is constantly changing with time. The averaged over one cycle all these vectors will be a null vector.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions