Motor Development and Principles of Motion

These flashcards cover key concepts from the lecture on motor development and principles of motion, providing definitions and explanations related to the material discussed.

What is motor development?

The changes in motor learning and motor control across the lifespan, including the acquisition of skills and abilities in infants/children and decline in old age.

What are the three types of constraints that influence motor development?

Individual, Environmental, Task.

What is the significance of Newton's first law of motion in motor development?

An object at rest stays at rest; an object in motion stays in motion at the same speed and direction until acted upon by an external force.

What affects the performance of an object in motion according to Newton's second law of motion?

The acceleration of an object is proportional to the force applied and inversely proportional to its mass.

What is the principle of moving against gravity?

To maximize performance, one must find the optimal relationship between force and distance.

What happens to an object in the flight path under gravity?

Gravity affects an object equally at all times, with changes in distance based on the take-off angle.

What does rotational velocity affect?

The velocity of an object being projected.

Why do limbs bend during the beginning of a projection?

To decrease the required energy by reducing inertia, which is the object's resistance to motion.

What is an open kinetic chain?

A correctly timed sequence of movements used to perform a skill, where each movement applies force just after the previous one.

What is force absorption in relation to landing from a jump?

Bending knees absorbs the ground force of landing, decreasing impact.

What are the key elements of maintaining stability?

A wide base of support and ensuring the center of gravity is low and inside the base of support.

How does stability affect mobility?

Mobility is sacrificed at the expense of stability; to become mobile, one must become unstable.

Which is more stable, walking or running? Why?

Walking is generally more stable than running because balance is easier to maintain at lower speeds.