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2. Ball (rhythmic gymnastics) - Wikipedia

   en.wikipedia.org/wiki/Ball_(rhythmic_gymnastics)

   The ball was recognised as an official apparatus from the beginning, along with the hoop and rope, and routines began to incorporate more sophisticated techniques and artistic choreography. [ 3 ] The evolution of the rhythmic ball reflects the broader development of rhythmic gymnastics, emphasizing a blend of athleticism, artistry, and innovation.

3. List of knot terminology - Wikipedia

   en.wikipedia.org/wiki/List_of_knot_terminology

   A bight is a slack part in the middle of a rope, usually a curve or loop. [1] [2] Knots that can be tied without access to either end of the rope are called knots in the bight. To tie a knot with a bight is to double up the rope into a bight and then tie the knot using the double rope.

4. List of acrobatic activities - Wikipedia

   en.wikipedia.org/wiki/List_of_acrobatic_activities

   Jump rope – Tool used in the sport of skipping/jump rope where one or more participants jump over a rope swung so that it passes under their feet and over their heads. Kiteboarding – Extreme sport where the kiteboarder harnesses the power of the wind with a large controllable power kite to be propelled across the water, land, or snow.

5. Exercise ball - Wikipedia

   en.wikipedia.org/wiki/Exercise_ball

   An exercise ball is a ball constructed of soft elastic, typically in 5 diameters of 10 cm increments, from 35 to 85 cm (14 to 33 in), and filled with air. The air pressure is changed by removing a valve stem and either filling with air or letting the ball deflate.

6. Kendama - Wikipedia

   en.wikipedia.org/wiki/Kendama

   "Deer horn and ball" was the form that the kendama took on when it arrived in Japan for the first time, literally a deer horn attached to a ball. Later on, some people replaced the deer horn with a piece of bamboo due to deer horn costing too many resources, making the bamboo and ball .

7. Block and tackle - Wikipedia

   en.wikipedia.org/wiki/Block_and_tackle

   Typical values are 1.04 for roller bearing sheaves and 1.09 for plain bearing sheaves (with wire rope). [11] The increased force produced by a tackle is offset by both the increased length of rope needed and the friction in the system. In order to raise a block and tackle with a mechanical advantage of 6 a distance of 1 metre, it is necessary ...

8. Monkey's fist - Wikipedia

   en.wikipedia.org/wiki/Monkey's_fist

   A throwing monkey's fist can be created by tying around a heavy material such as iron ball, or stone. A floating monkey's fist can be created by tying around a buoyant material such as cork, styrofoam, air filled ring or ball. It is also the most common knot used in a pair for cufflinks where it is considered a "silk knot."

9. Bouncing ball - Wikipedia

   en.wikipedia.org/wiki/Bouncing_ball

   This roughly corresponds to a COR of 0.735–0.775 (Type 1 ball), 0.728–0.762 (Type 2 & 3 balls), and 0.693–0.728 (High Altitude balls) when dropped on the testing surface. [ note 3 ] ITTF : Regulates the playing surface so that the table tennis ball bounces approximately 23 cm when dropped from a height of 30 cm. [ 46 ] This roughly ...