Question 1 What type of friction occurs when a body is already sliding in motion? Which...
Question 1
What type of friction occurs when a body is already sliding in motion? Which direction is this friction force pointing? What does this say about the net force on the object now?
Homework Answers
What type of friction occurs when a body is already sliding in motion?
A) kinetic friction occurs when a body is already in sliding motion .
but when the body is at rest and has a tendency to move than static frictional forces would act .
There are also other frictional forces such as fluid friction ( also known as viscous force ) , aero friction , rolling friction etc .
Which direction is this friction force pointing?
A) kinetic friction is always in a direction opposite to the relative sliding between two bodies .
It is important to note that kinetic friction only opposes the relative slipping between two bodies .
It always ensures the relative rest between to bodies in contact .
kinetic friction can bring a moving body to rest , it also may help a body to move .
What does this say about the net force on the object now?
A) The net force on the body now is in a direction opposite to the direction of motion of the body .
The force would decelerate the body ,and the body will come to rest after sometime . and then this frictional
force stops to act ( because there is no relative motion between the two bodies in contact )..
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