kinetic energy question on rackets mass and speed

Discussion in 'Racquets' started by rst, Dec 30, 2012.

  1. rst

    rst Rookie

    Jan 23, 2012
    northern nv
    "When I run, I begin to sweat because for every 3 Joules of kinetic energy my muscles put into me moving they create 7 Joules of heat, which I must get rid of or my body chemistry breaks down and I die. ............." from

    i inputted some values for racket weight and velocity on an K calculator

    a 10.7 oz racket and 12.7 ounce each at 20mph gave a difference of about 2.2 J(oules?) would this also mean that perstroke the heavier racket would cause nearly 6.5 joules of bodyheat in excess of the lighter racket????
  2. Steve Huff

    Steve Huff Legend

    Feb 11, 2004
    Technically, yes. You have to work harder to swing more mass. But, you have to calculate using swing weight, as it takes more energy to swing a stick with a weight on the end than it does one with the weight closer to the hand. If you were just holding a racket, the static weight could be used for determining energy used.

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