Question

Which friction comes into play when we try to move an object at rest?

Answer 1

The above question asks us which force comes into play when we have to move an object from rest. To find this we will first discuss what friction is and what are the different types of friction that acts on different bodies moving over one another.

Complete step-by-step solution: -
In the above question to find which friction comes into play let us first discuss what is friction and what are the types of frictions?
Friction can be defined as the force that opposes the motion of a solid object over another. Friction is the force that acts between the two surfaces that are sliding, or trying to slide, across each other. For example, when we try to push a box along the floor, friction makes this difficult.
Friction will always work in the direction opposite to the direction in which the object is moving, or trying to move. Friction slows a moving object down.
There are mainly four types of friction acting on bodies that are static friction, sliding friction, rolling friction, and fluid friction. Friction and normal force are always directly proportional to the contacting surfaces and it doesn’t depend on the hardness of the contacting surface.
But in the question given here we have to find which of the above friction comes into play when we have to move an object from rest so, when we apply more force than the body. It starts moving and immediately static friction tries to stop the body by applying the force in the opposite direction. In very general terms Static friction comes into play when an object at rest is moved relative to another surface. Since it is difficult to move an object from rest as compared to increasing the speed of a moving object, the static friction usually has the highest magnitude.

Note: Always remember in the types of frictions that the magnitude of static friction is highest in all the types of friction then it comes the sliding friction after that it is rolling friction and at the end the least magnitude is of the fluid friction from all the above frictional forces.