When a body is whirled in a horizontal circle by means of a string, the centripetal force is supplied by:
Correct answer: B. Tension in the string
- A. Mass of a body
- B. Tension in the string
- C. Velocity of a body
- D. Centripetal acceleration
Explanation
Option B is correct. Yes, the centripetal force is supplied by the tension in the string. When a body is whirled in a horizontal circle by means of a string, the string exerts a force on the body towards the centre of the circle. This force is called the centripetal force. The centripetal force is necessary to keep the body moving in a circular path. The tension in the string is the force that the string exerts on the body. The tension in the string is equal to the centripetal force. The tension in the string is given by the following equation:T = Fc = mv2/r
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