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प्रश्न
A boy rolls a rubber ball on a wooden surface. The ball travels a short distance before coming to rest. To make the same, ball travel longer distance before coming to rest, he may
विकल्प
spread a carpet on the wooden surface
cover the ball with a piece of cloth
sprinkle talcum powder on the wooden surface
sprinkle sand on the wooden surface
उत्तर
sprinkle talcum powder on the wooden surface
Explanation -
Talcum powder reduces friction force and the ball will cover longer distance.
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