about fast bowling

Pace bowler is one of two main approaches to bowling in the sport of cricket, the other being spin bowling. Practitioners of pace bowling are usually known as fast bowlers, quicks, or pacemen. They can also be referred to as a seam bowler, a swing bowler or a 'fast bowler who can swing it' to reflect the predominant characteristic of their deliveries. Strictly speaking, a pure swing bowler does not need to have a high degree of pace, though dedicated medium-pace swing bowlers are rarely seen at Test level these days.

The aim of pace bowling is to deliver the ball in such a fashion as to cause the batsman to make a mistake.The bowler achieves this by making the hard cricket ball deviate from a predictable, linear trajectory at a speed that limits the time the batsman has to compensate for it. For deviation caused by the ball's stitching (the seam), the ball bounces off the pitch and deflects either away from the batsman's body, or inwards towards them. Swing bowlers on the other hand also use the seam of the ball but in a different way. To 'bowl swing' is to induce a curved trajectory of the cricket ball through the air.A typical fast delivery by a professional has a speed in the range of 137–153 km/h (85–95 mph).