Question

If no external force acts on particle, then which of the following is incorrect about partical?
a) Particle may be at rest
b) Particle moves with uniform velocity on liner path
Particle moves with uniform speed on circle
d) None of the above​

Answer 1

Answer:

à) partial may at rest

Explanation:

as no external force is acting on it already frictional force is acting on it so it is at rest due to frictional force

Answer 2

Explanation:

d none of the above

every statement is correct as

1 the particle may be at rest as there is no force acting on particle and because of inertia the particle will not move

2 without external forces which hinder particles motion like air resistance etc the particle can keep on moving with same velocity

3 velocity of particle in a circular path changes at every point but the speed will remain. constant if external forces are absent