What is the main purpose of a special interest group?

A special interest group main purpose is to influence government policies in their favor.

Explanation:

A special interest group has to do with a group of persons in an organization sharing one or more concerns in an attempt to influence government policies.

A special interest group has the primary purpose of promoting the special interest of the group.

A special interest is also known as an interest group that generally comprises a group of people who have common goals and by so doing influence the government to do their bidding.

It helps to promote interests in the areas of knowledge, Technology or Education where the group members can effectively proffer solution in a specific area.

They also arrange conferences, meeting and produce reports in a specific field.

One takes longer to slow down than the other because one has more mass(the train) compared to the bowling ball!