Biomechanics and Lever Systems Quiz

The science that studies the movements of the human body.

A point of reference for describing body positions and movements. The body is standing tall, facing forward, arms at sides, palms facing forward.

A plane of movement where motion occurs from front to back, such as forward rolls, squats, and chest passes.

A plane of movement where motion occurs side to side, such as cartwheels and jumping jacks.

A straight line around which a body rotates.

The sagittal plane divides the body into left and right halves. It rotates around the frontal axis.

The frontal plane divides the body into front and back halves. It rotates around the sagittal axis.

A lever with the fulcrum positioned between the load and the effort.

A lever with the load located between the fulcrum and the effort.

A lever with the effort located between the fulcrum and the load.

A body in motion will stay in motion at a constant speed and direction unless acted upon by an external force. A body at rest will remain at rest.

An object's change in velocity is proportional to the force applied and acts in the same direction (F = m * a).

For every force applied, there is an equal and opposite reaction force.

The tendency of an object to resist change in its motion.

The rate at which an object's velocity changes over time.

A lever provides a mechanical advantage when the effort arm is longer than the load arm, making it easier to move a heavy load.

A lever has a mechanical disadvantage when the load arm is longer than the effort arm, requiring more force to move the load.

A vector is a quantity that has both magnitude (size) and direction.

Displacement, acceleration, velocity, and force are all examples of vectors.

A scalar is a quantity that has only magnitude (size) - direction is not important.

A force that pulls everything towards the center of the Earth. It's a constant force we all experience.

A force that opposes motion when two surfaces rub together. It can be helpful in sports, like grip on a tennis racket.

The ability to move efficiently and effectively, using minimal energy. It's a key part of athletic success.

The less energy an athlete uses to perform a skill, the more economical their movement is. They use less oxygen, allowing them to move for longer.

Energy wasted during movement that doesn't contribute to achieving a goal.

Energy spent on movements that are not efficient or effective.

Techniques and drills designed to minimize wasted energy during movement.

The process of eliminating energy leaks from a skill.

A common focus for coaches and athletes to improve performance.