Is a train moving on a circular track, an inertial frame of reference ?

A toy train moving around a circular track has rotatory motion.

The acceleration of a particle is zero as measured from an inertial frame of reference. Can we conclude that no force acts on the particle?

Define inertial frame and non-inertial frame. Is earth an inertial frame of reference?

Assertion: The driver in a vechile moving with a constant speed on a straight road is in a non-inertial frame of reference. Reason: A reference frame in which Newton's law of motion are applicable is non-inertial.

Frames moving uniformly with respect to an inertial frame are

(A) : A reference frame attached to earth is a non inertial frame of reference. (R) : The reference frame which has an acceleration is called a non inertial frame of reference.

Statement I: A concept of pseudo force is valid both for inertial as well as non-inertial frame of reference. Statement II: A frame accelerated with respect to an inertial frame is a non-inertial frame.

Assertion: The driver in a vechicle moving with a constant speed on a straight road is in a non-inertial frame of referance. Reason: A reference frame in which Newton's laws of motion are applicable is non-inertial.

A particle of mass m is observed from an inertial frame of reference and is found to move in a circle of radius r with a uniform speed v. The centrifugal force on it is

A person applies a constant force vecF on a particle of mass m and finds tht the particle movs in a circle of radius r with a uniform speed v as seen from an inertial frame of reference.