Biomechanics Week 2: Introduction to Forces

The amount of "stuff" an object contains.

Kilograms (kg)

The amount of gravitational force exerted on an object.

<p>Newtons (N)</p> Signup and view all the answers

<p>Weight = mass * acceleration due to gravity</p> Signup and view all the answers

<p>Resistance to action or to change (acceleration).</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>Any structure or organization of related structures whose state of motion is of analytical interest.</p> Signup and view all the answers

<p>All of the above</p> Signup and view all the answers

<p>A standardized position of the human body.</p> Signup and view all the answers

<p>To accurately describe the location and movement of body parts.</p> Signup and view all the answers

<p>Sagittal, frontal, and transverse planes.</p> Signup and view all the answers

<p>The point at the intersection of the three cardinal planes that represents the average location of a system's mass.</p> Signup and view all the answers

<p>False</p> Signup and view all the answers

<p>The point where the gravitational pull is concentrated on a system's mass.</p> Signup and view all the answers

<p>A frame of reference defined by an origin and two or three orthogonal axes.</p> Signup and view all the answers

<p>A global frame of reference is fixed, while a local frame of reference is attached to a moving object.</p> Signup and view all the answers

<p>An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction, unless acted upon by an unbalanced force.</p> Signup and view all the answers

<p>The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass.</p> Signup and view all the answers

<p>Every body in the universe attracts every other body with a force that is directly proportional to the product of their masses and inversely proportional to the square of the separation between the two objects.</p> Signup and view all the answers

<p>A simplified representation of the system free of the movement environment.</p> Signup and view all the answers

<p>They help to simplify complex movement situations and provide a visual representation of the forces acting on an object.</p> Signup and view all the answers

<p>A push or a pull.</p> Signup and view all the answers

<p>Forces can maintain or cause a change in motion.</p> Signup and view all the answers

<p>Direction, orientation, point of application, magnitude, and line of action.</p> Signup and view all the answers

<p>A graphical representation of a force that shows both its magnitude and direction.</p> Signup and view all the answers

<p>Internal forces act within a system, while external forces act on a system.</p> Signup and view all the answers

<p>Muscle tension</p> Signup and view all the answers

<p>A force that opposes motion between two surfaces in contact.</p> Signup and view all the answers

<p>Static friction and kinetic friction.</p> Signup and view all the answers

<p>F = μN</p> Signup and view all the answers

<p>Weight, surface area, and contacting materials.</p> Signup and view all the answers

<p>The sum of two or more force vectors.</p> Signup and view all the answers

<p>The vector addition of all the external forces acting on an object.</p> Signup and view all the answers

<p>Forces that do not act along the same line of action, but that act through the same point at the same time.</p> Signup and view all the answers

<p>Forces that have the same line of action, though sometimes in different directions.</p> Signup and view all the answers

<p>The state of an object that is at rest or moving with a constant velocity (zero acceleration).</p> Signup and view all the answers