Consider the following statements regarding partial balancing of locomotives,
1) Unbalanced portion of the primary force perpendicular to the line of stroke causes variation in the tractive effort of the engine
2) The maximum magnitude of the unbalanced force along the line of stroke is known as hammer blow.
Which of the above statements are true?
1
only 1
2
only 2
3
both 1 and 2
4
neither 1 nor 2