Which expression correctly represents PTR?

Which expression correctly represents PTR?

• A. Ball Speed ÷ Ball Spin = PTR
• B. Ball Speed ÷ Clubhead Speed = PTR
• C. PTR = Ball Speed × Clubhead Speed
• D. Clubhead Speed ÷ Ball Speed = PTR

Answer: (B)

PTR shows how efficiently the clubhead’s speed becomes ball speed at impact. It’s defined as the ratio of ball speed to clubhead speed, so the correct expression is ball speed ÷ clubhead speed. Understand that ball speed is how fast the ball leaves the face, while clubhead speed is how fast the clubhead is moving at impact. A higher PTR means energy is transferred more efficiently from the club to the ball; a lower PTR indicates more energy loss. The other options don’t fit because they either use spin instead of speed, multiply speeds, or take the reciprocal of the correct ratio.

PTR shows how efficiently the clubhead’s speed becomes ball speed at impact. It’s defined as the ratio of ball speed to clubhead speed, so the correct expression is ball speed ÷ clubhead speed.

Understand that ball speed is how fast the ball leaves the face, while clubhead speed is how fast the clubhead is moving at impact. A higher PTR means energy is transferred more efficiently from the club to the ball; a lower PTR indicates more energy loss.

The other options don’t fit because they either use spin instead of speed, multiply speeds, or take the reciprocal of the correct ratio.