(1) The act of hitting vigorously
(1) Beat with force
(2) Propel or hit with force
(3) Attack forcefully
(1) He gave a whang with his hammer
(2) Johnny's shrill harmonica joined the whang of the guitar to make a sound powerful enough to bring the walls down.
(3) He gave a whang with his hammer
(4) He went for the cylinder wrench, which he then used for the non-standard purpose of vigorously whanging the valve with strong overhand strokes.
knock
belt
rap
whack