Robert Adair (physicist): Weight

Robert Adair (physicist) is Physicist and author. Explore interesting quotes on weight.

Robert Adair (physicist): 22 quotes0 likes

“The maximum Magnus force on a ball spinning at a rate of 1800 rpm is seen to be about one-third of the weight of the ball, so we cannot expect a ball spinning at that rate to curve more than one third of the distance it will fall under gravity.”

Robert Adair (physicist)

Source: The Physics Of Baseball (Second Edition - Revised), Chapter 2, The Flight Of The baseball, p. 14

“Every 3 feet of lead is worth about one-tenth of a second, and a rolling start is worth a good half second. Indeed, the difference between the runner having his weight mainly on his front foot and mainly on his back foot (but don't let the pitcher catch you leaning!) must be worth more than one-tenth of a second.”

Robert Adair (physicist)

Source: The Physics Of Baseball (Second Edition - Revised), Chapter 4, Running, Fielding, And Throwing, p. 57

“The American ash from which bats are made has an unusually high strength-to-weight ratio. Ash was celebrated in medieval times as the only proper wood from which to construct the lances of knights errant; an ash lance was light enough to carry and wield and strong enough to impale the opposition.”

Robert Adair (physicist)

Source: The Physics Of Baseball (Second Edition - Revised), Chapter 6, Properties Of Bats, p. 134