Question

Q. 6
Define:
(1) Circular motion
(I) Centripetal acceleration:
(iii) Centripetal force :​

Answer 1

Answer:

i) Circular Motion

In physics, circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation.

ii) Centripetal Acceleration

Centripetal acceleration, property of the motion of a body traversing a circular path. The acceleration is directed radially toward the centre of the circle and has a magnitude equal to the square of the body's speed along the curve divided by the distance from the centre of the circle to the moving body.

iii) Centripetal Force

A centripetal force is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.

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Answer 2

◇ circular motion-

The movement of a body following a circular path is called a circular motion. Now, the motion of a body moving with constant speed along a circular path is called Uniform Circular Motion. Here, the speed is constant but the velocity changes.

◇ centripetal motion-

the force which is need to make an object travels in a circular path is known as centripetal force.

$F = \frac {mv^2}{r}$

◇ centripetal acceleration-

the property of the motion of a body traversing a circular path. The acceleration is directed radially toward the centre of the circle and has a magnitude equal to the square of the body's speed along the curve divided by the distance from the centre of the circle to the moving body