Question

Which of the following is not non constant force

A. gravitational force
B. frictional force
C.magnetic force
D. electrical force​

Answer 1

frictional force

Step-by-step explanation:

Friction always acts to oppose any relative motion between surfaces. For the simple example of a book resting on a flat table, the frictional force is zero. There is no force trying to move the book across the table, so there is no need for a frictional force because there is nothing for the frictional force to oppose.

Answer 2

Frictional force. hope this helps have a good day