Question:
A stone of mass $m$ tied to a string of length $l$ is rotated in a circle with the other end of the string as the centre. The speed of the stone is $ \upsilon $ . If the string breaks, the stone will:
A stone of mass $m$ tied to a string of length $l$ is rotated in a circle with the other end of the string as the centre. The speed of the stone is $ \upsilon $ . If the string breaks, the stone will:
Updated On: Jul 12, 2022
- move towards the centre
- move away from the centre
- move along tangent
- stop
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The Correct Option is C
Solution and Explanation
When the string breaks, centripetal force on stone becomes zero. So, net acceleration on the stone is zero. So, stone move on straight path i.e., along tangent.
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Notes on Motion in a plane
Concepts Used:
Motion in a Plane
It is a vector quantity. A vector quantity is a quantity having both magnitude and direction. Speed is a scalar quantity and it is a quantity having a magnitude only. Motion in a plane is also known as motion in two dimensions.
Equations of Plane Motion
The equations of motion in a straight line are:
v=u+at
s=ut+½ at2
v2-u2=2as
Where,
- v = final velocity of the particle
- u = initial velocity of the particle
- s = displacement of the particle
- a = acceleration of the particle
- t = the time interval in which the particle is in consideration