Question

Which of the following statement is wrong
1) Static friction between two surfaces is a variable quantity and its maximum value is known as limiting friction, after which the relative motion between the surfaces begin and kinetic friction comes into play.
2) The coefficient of static friction is slightly less than that of the kinetic friction
3) The friction between the two surfaces in contact is independent of the area of contact or speed of motion and depends upon the nature of surfaces in contact
4) Pseudo force is applied only when our reference of observation is non-inertial and its magnitude is always equalto the product ofmass of the particle and acceleration of the frame ofreference. It is directed opposite to the acceleration of frame of reference. ​

Answer 1

Answer:

Statement 2 is wrong.

Explanation:

Answer 2

Of the following 2) The coefficient of static friction is slightly less than that of the kinetic friction is wrong.

• Static friction is present between two surfaces with no motion. It is the opposing force that occurs when a force is given to a body that does not cause it to move.
• While the friction present between the moving surfaces is called kinetic friction.
• The coefficient of static friction is more than that of the kinetic friction because you have to apply more force to the body which is originally at rest. It's harder to start moving an object that's at rest than it is to start moving an object that's already moving.