Give any two examples of centripetal force.

1.	Give any two examples of centripetal force.
Answer» Examples of centripetal force : 1. For an Earth-satellite in a circular orbit, the centripetal force is the gravitational force exerted by the Earth on the satellite. 2. In the Bohr atom, the centripetal force on an electron in circular orbit around the nucleus is the attractive Coulomb force of the nucleus. 3. When an object tied at the end of a string is revolved in a horizontal circle, the centripetal force is the tension in the string. 4. When a car takes a turn in a circular arc on a horizontal road with constant speed, the force of static friction between the car tyres and road surfaces is the centripetal force. Note : The tension in a string or the force of friction is electromagnetic in origin.

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Examples of centripetal force :

1. For an Earth-satellite in a circular orbit, the centripetal force is the gravitational force exerted by the Earth on the satellite.

2. In the Bohr atom, the centripetal force on an electron in circular orbit around the nucleus is the attractive Coulomb force of the nucleus.

3. When an object tied at the end of a string is revolved in a horizontal circle, the centripetal force is the tension in the string.

4. When a car takes a turn in a circular arc on a horizontal road with constant speed, the force of static friction between the car tyres and road surfaces is the centripetal force.

Note : The tension in a string or the force of friction is electromagnetic in origin.

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