CBSE-XI-Physics
06: Friction
- #7-aShould the friction coefficient between the card and the coin be small or large? (b) Should the coin be light or heavy? (c) Why does the experiment fail if the card is gently pushed?Ans : The coefficient of friction between the card and the coin should be small. (b) The coin should be heavy. (c) If the card is pushed gently, the experiment fails because the frictional force gets more to time to act and it may gain some velocity and move with the card.
- #7-bShould the coin be light or heavy?Ans : The coin should be heavy.
- #7-cWhy does the experiment fail if the card is gently pushed?Ans : If the card is pushed gently, the experiment fails because the frictional force gets more to time to act and it may gain some velocity and move with the card.