Is a bus moving along a circular track, an inertia frame of reference ?

Is earth an inertial frame of reference?

A particle is moving along a circular track of radius 1m with uniform speed. What is the ratio of the distance covered and the displacement in half revolution?

A simple pendulum of length 1 and having a bob of mass M is suspended in a car. The car is moving on a circular track of radius R with a uniform speed v. If the pendulum makessmall oscillations in a radial direction about its equilibrium position, what will be its time period ?

A cyclist is moving on a circular track of radius 80 m with a velocity of 72 km//h .He leans from the direction through an angle of :

What is a frame of reference? Explain inertial and non-inertial frames of reference.

Name the physical quantities which remains constant for a particle moving along a circular path in a horizontal plane in uniform motion.

A mass of 5 kg is moving along a circular path of radius 1 m. If the mass moves with 300 revolutions per minute, its kinetic energy would be

The magnetic force depends on v which depends on the inertial frame of reference. Does then the magentic force differ from inertial frame to frame? Is it reasonable that the net acceleration has a different value in different frames of reference?