Single correct option
Consider the following statements about friction:
1. Rolling friction is less than sliding friction.
2. Friction acts in the same direction as the relative motion of the surfaces.
Which of the statements given above is/are correct?
1. Rolling friction is less than sliding friction.
2. Friction acts in the same direction as the relative motion of the surfaces.
Which of the statements given above is/are correct?
- A. 1 only
- B. 2 only
- C. Both 1 and 2
- D. Neither 1 nor 2
Show answer and solution
Answer: (A) 1 only
For the same load, it is easier to roll a body than to slide it, which is why wheels and ball bearings are used, so statement 1 is correct. Friction always acts opposite to the relative motion or the tendency of motion of the surfaces in contact. Statement 2 is wrong.
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