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Ncert exemplar solutions
Gravitation | Gravitation - Exercise
Question 4
A boy is whirling a stone tied with a string in a horizontal circular path. If the string breaks, the stone
(a) will continue to move in the circular path
(b) will move along a straight line towards the center of the circular path
(c) will move along a straight line tangential to the circular path
(d) will move along a straight line perpendicular to the circular path away from the boy
The answer is (c) will move along a straight line tangential to the circular path
Explanation:
At any instance of time objects in circular motion tend to be in rectilinear motion. The object keeps on moving due to centripetal force and it moves along a straight line tangential to the circular path when strings break.
Question 4
A boy is whirling a stone tied with a string in a horizontal circular path. If the string breaks, the stone
(a) will continue to move in the circular path
(b) will move along a straight line towards the center of the circular path
(c) will move along a straight line tangential to the circular path
(d) will move along a straight line perpendicular to the circular path away from the boy
The answer is (c) will move along a straight line tangential to the circular path
Explanation:
At any instance of time objects in circular motion tend to be in rectilinear motion. The object keeps on moving due to centripetal force and it moves along a straight line tangential to the circular path when strings break.
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