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  2. Stimpmeter - Wikipedia

    en.wikipedia.org/wiki/Stimpmeter

    The ball is pulled out of the notch by gravity when the device is slowly raised to an angle of about 20°, rolling onto the green at a repeatable velocity of 6.00 ft/s (1.83 m/s). [6] The distance travelled by the ball in feet is the 'speed' of the putting green.

  3. Coefficient of restitution - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_restitution

    The COR is a property of a pair of objects in a collision, not a single object. If a given object collides with two different objects, each collision has its own COR. When a single object is described as having a given coefficient of restitution, as if it were an intrinsic property without reference to a second object, some assumptions have been made – for example that the collision is with ...

  4. Equations for a falling body - Wikipedia

    en.wikipedia.org/wiki/Equations_for_a_falling_body

    During the first 0.05 s the ball drops one unit of distance (about 12 mm), by 0.10 s it has dropped at total of 4 units, by 0.15 s 9 units, and so on. Near the surface of the Earth, the acceleration due to gravity g = 9.807 m/s 2 ( metres per second squared , which might be thought of as "metres per second, per second"; or 32.18 ft/s 2 as "feet ...

  5. Projectile motion - Wikipedia

    en.wikipedia.org/wiki/Projectile_motion

    Vacuum trajectory of a projectile for different launch angles. Launch speed is the same for all angles, 50 m/s, and "g" is 10 m/s 2. To hit a target at range x and altitude y when fired from (0,0) and with initial speed v the required angle(s) of launch θ are:

  6. Speed Score - Wikipedia

    en.wikipedia.org/wiki/Speed_Score

    Speed Score, often simply abbreviated to Spd, is a statistic used in Sabermetric studies to evaluate a baseball player's speed. It was invented by Bill James, and first appeared in the 1987 edition of the Bill James Baseball Abstract. [1] Speed score is on a scale of 0 to 10, with zero being the slowest and ten being the fastest.

  7. Ballistic coefficient - Wikipedia

    en.wikipedia.org/wiki/Ballistic_coefficient

    Newton's experiments on drag were through air and fluids. He showed that drag on shot increases proportionately with the density of the air (or the fluid), cross sectional area, and the square of the speed. [9] Newton's experiments were only at low velocities to about 260 m/s (853 ft/s). [14] [15] [16]

  8. Elastic collision - Wikipedia

    en.wikipedia.org/wiki/Elastic_collision

    The final x and y velocities components of the first ball can be calculated as: [5] ′ = ⁡ () + ⁡ + ⁡ + ⁡ ⁡ (+) ′ = ⁡ () + ⁡ + ⁡ + ⁡ ⁡ (+), where v 1 and v 2 are the scalar sizes of the two original speeds of the objects, m 1 and m 2 are their masses, θ 1 and θ 2 are their movement angles, that is, = ⁡, = ⁡ (meaning ...

  9. Exit velocity - Wikipedia

    en.wikipedia.org/wiki/Exit_velocity

    Giancarlo Stanton held the MLB record for highest exit velocity at 122.2 miles per hour (196.7 km/h) from 2015 to 2022. In baseball statistics, exit velocity (EV) is the estimated speed at which a batted ball is travelling as it is coming off the player's bat.