Which of the following is a conservative force? 1.force due to friction 2.force due to gravity 3. both (1) and (2) 4. neither (1) nor (2)

Option 2 is the correct answer.

Explanation:

I f the work done by a force does not depend upon the path of mass then the force is called conservative force.

Work done by frictional force depends upon path followed by mass, so frictional force is a non conservative force. But work done by gravitational force does not depend upon path followed by mass, so gravitational force is a conservative force.

Option 2 is the correct answer.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement