Question : Which of the following statements is correct?
I. Rolling friction is greater than the sliding friction.
II. The frictional force exerted by fluids is called drag.
Option 1: Only I is correct.
Option 2: Neither I nor II is correct.
Option 3: Both I and II are correct.
Option 4: Only II is correct.
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Correct Answer: Only II is correct.
Solution : The correct option is Only II is correct.
Rolling friction is generally less than sliding friction. The frictional force exerted by fluids, such as air or water, is called drag. It opposes the motion of an object through the fluid, affecting its speed and direction. Drag force increases with the object's Velocity.
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Question : Which type of friction is considered a self-adjusting force?
Option 1: Kinetic friction
Option 2: Centripetal friction
Option 3: Rolling friction
Option 4: Static friction
Question : The Constitution of India came into force in
Option 1: 1951
Option 2: 1956
Option 3: 1950
Option 4: 1949
Question : Improve the underlined part of the sentence. Choose 'No improvement' as an answer if the sentence is grammatically correct
Don't try to force the window open, or you might broken it.
Option 1: you might breaks
Option 2: you have break
Option 3: you might break
Option 4: No improvement
Question : Which of the following laws applies to the force of attraction or repulsion between two point charges?
Option 1: Kirchhoff's Law
Option 2: Newton's Law of Universal Gravitation
Option 3: Coulomb's Law
Option 4: Newton's Laws of Motion
Question : What is speed?
Option 1: It is the distance covered by an object in a unit of time
Option 2: It is the velocity of an object per unit time
Option 3: It is the force applied on covering a unit distance
Option 4: It is the acceleration of an object per unit time
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