Question

Select the incorrect statement(s) about static friction.
I. Static friction exists on its own.
II. In the absence of applied force static friction is maximum.
III. Static friction is equal and opposite to the applied force upto a certain limit.
IV. Static friction is greater than limiting friction

• A. I and IV
• B. II and III
• C. I and III
• D. I and II

Answer 1

Answer: (D)

The static friction comes into play, the moment there is an applied force. As the applied force increases, static friction also increases, remaining equal and opposite to the applied force upto a certain limit. But if the applied force increases so much, it overcomes the static friction and the body starts moving.