Question

Name the force that keep the object moving in a circular path with constant speed . What would happen if this force is absent?

Answer 1

There act two forces when an object moves in a circular motion.

The force which keeps an object in a circular path with constant speed acts towards the centre. This force is called CENTRIPETAL FORCE. This force pulls the object inwards.

Whereas the force which tends to free the object from centripetal force is called CENTRIFUGAL FORCE. This force tries to escape out to continue the straight line motion of the object.

Both these forces balance each other and hence the body moves in a circular motion.

Hence, if the centripetal force is absent, the smaller object will tend to move in straight line motion which will be the tangent to the circular path in which it was revolving.

For example - Earth attracts the moon towards it through centripetal force and the moon tries to escape this force using its own centrifugal force. Hence, moon revolves around earth. If earth's centripetal force was absent, the moon would pursue a straight line motion from the point the centripetal force became absent.

That's your answer.


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Answer 2

Answer:

Centripetal force that keep the object moving in a circular path with constant speed .

Explanation:

• Centripetal and centrifugal forces are the forces experienced by a rotating object.
•  Centripetal force keeps an object in circular motion, always toward the centre of that circle.
• For example, the gravitational pull of the sun is the centripetal force that keeps the Earth in its orbit.
• Because of this change in direction, we say that the velocity is changing and the motion is accelerating.
• From Newton's first law, we know that an external force is required to generate acceleration.
• Therefore, a force is required to keep the body moving in a circular orbit.
• A force is required to keep the body moving in a circular orbit. This force is called centripetal force.

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