Dynamics of a System of Particles Quiz

<p>The point where the resultant of gravitational force on all the particles of the body acts (B)</p> Signup and view all the answers

<p>Centre of Mass is a point in a body where the entire mass is concentrated for describing its translatory motion. Centre of Gravity is a point where the whole weight of the body is assumed to act, and it is where the resultant of gravitational force on all the particles of the body acts.</p> Signup and view all the answers

<p>Rcm = (m1<em>r1 + m2</em>r2) / (m1 + m2) (A)</p> Signup and view all the answers

<p>The position vector of the centre of mass of a two-particle system is given by Rcm = (m1R1 + m2R2) / (m1 + m2), where m1 and m2 are the masses of the particles, and R1 and R2 are their position vectors with respect to an origin point O.</p> Signup and view all the answers

<p>The significance of Centre of Mass is that it allows the application of Newton's laws of motion to finite or extended objects, as the laws are applicable to point objects. It expands the applicability of Newton's laws.</p> Signup and view all the answers

<p>In a uniform gravitational field, such as that of Earth on a small body, the Centre of Gravity coincides with the Centre of Mass.</p> Signup and view all the answers

<p>The introduction of the concept of Centre of Mass allows the application of Newton's laws to finite or extended objects, expanding the applicability of the laws beyond just point objects.</p> Signup and view all the answers

<p>Metal ions in biological systems are classified as essential, non-essential, trace, and toxic based on their action. Essential metal ions are required for normal physiological functions, non-essential metal ions are not essential but may have biological activity, trace metal ions are required in very small amounts, and toxic metal ions can be harmful even in small quantities.</p> Signup and view all the answers

<p>Metallobiomolecules include enzymes, transport and storage proteins, and non-proteins. Enzymes facilitate biochemical reactions, transport and storage proteins help in the movement and storage of metal ions, and non-proteins also play important roles in metal ion binding and utilization.</p> Signup and view all the answers

<p>Membrane transport involves the movement of substances across biological membranes. Channels facilitate the selective passage of specific ions or molecules, while pumps use energy to actively transport ions or molecules against their concentration gradient.</p> Signup and view all the answers

<p>Bio-inorganic chemistry is the study of metal ions present in biological systems and their classification based on action, as well as metallobiomolecules such as enzymes, transport and storage proteins, and non-proteins.</p> Signup and view all the answers

<p>Metal ions in biological systems are classified based on their action as essential, non-essential, trace, and toxic.</p> Signup and view all the answers

<p>Membrane transport involves the movement of substances across biological membranes, facilitated by channels and pumps which regulate the flow of ions and molecules.</p> Signup and view all the answers