A ball is roll on a frictionless surface and no other force act on it will its speed decrease increase or remain unchanged
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remain unchanged
as no force is acting on it
as no force is acting on it
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The speed of the ball with all remain unchanged. Since there is no friction and no other force is acting on it, by Newton's first law if motion we can conclude that the ball's speed would remain unchanged.
If you are thinking that gravity can influence the speed of the ball then you should consider the angle made by the ball with gravity, 90 degrees , so it can't influence the speed of the ball. However if the plain is considered to be a vertical one then gravity would certainly act on the ball and then the speed would increase.
If you are thinking that gravity can influence the speed of the ball then you should consider the angle made by the ball with gravity, 90 degrees , so it can't influence the speed of the ball. However if the plain is considered to be a vertical one then gravity would certainly act on the ball and then the speed would increase.
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