Question: What penalty is a golfer given after hitting a golfer's ball during a putt?
About the article "Golf", section "Penalties".

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Penalties are incurred in certain situations.
They are counted towards a player's score as if there were extra swing(s) at the ball.
Strokes are added for rule infractions or for hitting one's ball into an unplayable situation.
A lost ball or a ball hit out of bounds result in a penalty of one stroke and distance (Rule 27–1).
A one-stroke penalty is assessed if a player's equipment causes the ball to move or the removal of a loose impediment causes the ball to move (Rule 18–2).
If a golfer makes a stroke at the wrong ball (Rule 19–2) or hits a fellow golfer's ball with a putt (Rule 19–5), the player incurs a two-stroke penalty.
Most rule infractions lead to stroke penalties but also can lead to disqualification.
Disqualification could be from cheating, signing for a lower score, or from rule infractions that lead to improper play.
 "Swingerz Golf" was made exclusively for GameCube, so the controls are designed specifically for a GameCube controller.
The player-controlled golfer can be aimed in any direction with the analog stick and can change clubs with the R and L buttons to in any distance or direction possible up to that golfer's particular power limitations.
With the X and Y buttons, the player may raise up the camera angle, zoom in on the hole, or rotate the camera around to see what is around an obstacle.
Hitting the B button will switch between a power shot and a normal shot.
To swing, the player pulls back on the C Stick until the desired power level is reached, then flicks it forward.
The accuracy of the shot depends on how straight the stick was moved.
If it is nearly or exactly straight, the word "Excellent" will show and the player's character will regain a bit of stamina.
Ratings of "Great" and "Good" mean the ball will fly more or less straight, but the player will lose stamina.
A rating of "Bad" or "Poor" means that the character will miss the ball, hit it short, or hit it well off the mark.
By holding the D-pad in any direction during the swing, the player may add spin to the ball to give it a certain flight pattern or behavior upon landing.
On the green, controls are similar, but there are some added visual cues.
Once the player has reached or is close enough to see the green, a grid appears, showing the player how a ball will react on any given part of the green.
Pressing left and right on the D-pad will make the lines thicker and more bold, making it easier to see on televisions that have a lower display resolutions. 
Putt-Putt's Fun House is a new app released by Nimbus Games after ten years of the release of the previous Putt-Putt Junior Adventure.
Android and iOS versions now available. 
The putt is used for putting the ball in the hole or closer to the hole (as in lagging) from the green or the fringe of the green.
The putter is used for the putt.
The golfer adjusts his/her putt to fit the circumstances of the play such as distance to the hole and slope of the green.
The face of the club starts square to the target line.
The club goes straight back and straight through along the same path like a pendulum.
One strategy is to aim the ball 10% past the hole.
Another is to look at the hole for long putts instead of the ball.
For short distance putts, sometimes the Safety Putt is employed. 
In every form of play, the goal is to play as few strokes per round as possible.
A golfer's score is usually expressed as the difference between the player's number of strokes and the par score.
A hole in one (or an "ace") occurs when a golfer sinks his ball into the cup with his first stroke from the tee.
Common scores for a hole also have specific terms.