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Related Concept Videos

Projectile Motion01:25

Projectile Motion

Projectile motion models the flight of an object launched into the air, such as a soccer ball kicked during a penalty, under the simplifying assumption that air resistance is negligible. When gravity is the only force, the object experiences a steady downward acceleration at all times. This single fact explains why projectile motion can be analyzed as two independent motions happening simultaneously: a horizontal motion that does not speed up or slow down, and a vertical motion that continually...
Projectile Motion01:20

Projectile Motion

An object thrown in the air follows a parabolic path under the influence of Earth's gravitational force. The motion of such an object is called projectile motion, and the object itself a projectile. The parabolic path followed by the projectile is called the trajectory. Some common examples of projectile motion are the launching of fireworks, a golf ball in the air, meteors entering the Earth's atmosphere, and the firing of bullets.
When an object falls under gravity and has no horizontal...
Projectile Motion: Example01:18

Projectile Motion: Example

The theory of projectile motion is very useful for players of several sports to improve their performance. For example, a javelin thrower needs to throw their javelin in such a way that it travels as far as possible. The javelin thrower takes a short run-up to increase the initial speed of the javelin. The range of a projectile is at its maximum at a 45° angle so javelin throwers try to angle their throw as close to 45° as possible.
When we speak of the range (R) of a projectile on level...
Motion of a Projectile01:23

Motion of a Projectile

Projectile motion becomes evident when a player kicks the ball into the air. The launch angle, or the angle at which the ball is kicked, plays a crucial role in determining the trajectory of the projectile. As the ball soars through the air, influenced solely by gravity, its motion can be dissected into two independent velocity components: the horizontal and the vertical.
Horizontal motion, governed by the initial kick, maintains a constant velocity throughout the flight of the soccer ball.
Quadratic Models01:23

Quadratic Models

Quadratic models are mathematical representations used to describe relationships in which the rate of change changes at a constant rate. These models appear in a wide variety of natural and engineered systems, especially those involving motion, forces, and optimization. One common application is analyzing the vertical motion of objects influenced by gravity, such as a ball thrown into the air.In such scenarios, the object's height changes over time in a curved pattern, rising to a maximum point...
Force and Momentum01:17

Force and Momentum

Force and momentum are intimately related. Force acting over time can change momentum, and Newton's second law of motion can be stated in its most broadly applicable form in terms of momentum. Momentum can be applied to systems where the mass is changing, such as rockets, as well as to systems of constant mass. Also, momentum continues to be a key concept in the study of atomic and subatomic particles in quantum mechanics. One can consider systems with varying mass in some detail; however, the...

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Importance of Jumping Ability in Handball Throwing Speed and Accuracy
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Published on: April 4, 2025

Catching a gently thrown ball.

Joan López-Moliner1, Eli Brenner, Stefan Louw

  • 1Department of Basic Psychology, Faculty of Psychology and Institute for Brain, Cognition and Behaviour (IR3C), University of Barcelona, Passeig de la Vall d'Hebron, 171, 08035, Barcelona, Catalonia, Spain. j.lopezmoliner@ub.edu

Experimental Brain Research
|September 24, 2010
PubMed
Summary
This summary is machine-generated.

People can catch balls even with brief visual interruptions. Catching success depends on when sight is lost and regained, impacting trajectory prediction and movement adjustment.

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Area of Science:

  • Human motor control
  • Perception-action coupling
  • Visuomotor coordination

Background:

  • Previous research indicates successful ball catching with partial visual information.
  • Understanding the precise visual requirements for effective catching remains an active area of investigation.

Purpose of the Study:

  • To quantify human ability to catch a ball during occluded vision.
  • To identify critical periods of visual occlusion that impair catching performance.

Main Methods:

  • Motion capture of ball and hand movements during one-handed underarm throws and catches.
  • Randomized visual occlusion of the catcher's sight for 250 ms intervals.
  • Analysis of catching success and movement adjustments under varying occlusion timings.

Main Results:

  • Participants successfully caught most balls despite intermittent vision.
  • Catching performance significantly degraded when occlusion occurred before ball release and vision was restored shortly before the catch.
  • Difficulties arose when insufficient time was available to predict trajectory or adjust movements post-occlusion.

Conclusions:

  • Human catching is robust to brief visual interruptions.
  • Catching success is critically dependent on the timing of visual information relative to the ball's trajectory and the opportunity for motor adjustment.