What provides the centripetal force in the following cases
earth revolving around the sun

What provides the centripetal force in the following cases electron revolving around the nucleus

What provides the centripetal force in the following cases car taking a turn?

What provides the centripetal force to a satellite revolving around the earth?

What is centripetal force?

What provides the centripetal force to a caar taking turn on a level road?

What remains constant when the earth revolves around the sun?

What is the work done by centripetal force?/

A train runs along an unbanked circular track of radius 30 m at a speed of 54 km//h . The mass of the train is 10^6 kg . What provides the centripetal force required for this purpose — Hie engine or the rails ? What is the angle of banking required to prevent wearing out of the rail ?