According to the PHB (p 182) after a 10 foot movement the player is able to make a long jump whose length is equal to their strength score. Each foot jumped costs 1 foot of movement.
I have a character with a speed of 25 who can jump 30 (due to the jump spell tripling their normal jump distance of 10). What happens when he runs out of movement?
- The player moves the full distance of the jump
- The player stops moving when they run out of movement and fall
- The player moves up to their movement speed, then finishes the jump on their next turn