a person has attached a stone to a string and whirling in the air very fast
a. What can be said about the motion of the stone as shown in the figure?
b. Is the stone exhibiting accelerated motion, if yes then justify
with suitable scientific explanation?
c Differentiate between linear uniform motion and uniform circular
d. If the string is broken where will the stone move?
Answers
Explanation:
When the boy is whirling a stone tied with a string in a circular path, the centripetal force acts towards the center of the circular path. However, when the string breaks the centripetal force ceases and there is no force acting. Thus, the stone as per Newtons first law will continue in a straight line and fly off along the tangent to the circular path.
Answer:
a)The motion is an accelerated motion.
b)
c)Uniform circular motion is different from uniform linear motion in following ways :
(1) Uniform linear motion exhibits only in one dimension while uniform circular motion is a 2 dimensional motion.
(2) Displacement can never be zero in uniform linear motion whereas may or may be zero in uniform circular motion.
(3) The magnitude and direction of velocity remains the same in uniform linear motion whereas the magnitude of velocity remains the same but its direction continuously changes in uniform circular motion.
d)When the boy is whirling a stone tied with a string in a circular path, the centripetal force acts towards the center of the circular path. However, when the string breaks the centripetal force ceases and there is no force acting. Thus, the stone as per Newtons first law will continue in a straight line and fly off along the tangent to the circular path.
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