11th Class Physics Chapter 2 Notes

Important Easy to understand 11th Class Physics Chapter 2 Notes Vectors and Equilibrium written by Professor Mr. Asad Abbas Suib. These notes are very helpful in the preparation of Physics for students of the 11th class and these are according to the paper patterns of all Punjab Book Boards.

Summary and Contents:
Topics which are discussed in the notes are given below:
  • What are Physical Quantities? Describe the Types on the basis of direction
  • What are the Methods For Representation Of Vector?
  • Explain Rectangular co-ordinate system
  • Rectangular co-ordinate system (i) Two dimensional co-ordinate system (ii) Three dimensional co-ordinate system.
  • How two vectors are added (Explain head to tail rule of vector addition). OR Prove that A+B=B+A.
  • Vector Subtraction OR How Two Vectors Are Subtracted?
  • What is the Multiplication Of Vector
  • What is Unit Vector? Write its formula.
  • What is Null Vector Or Zero Vector?
  • What are Equal Vectors?
  • What is Position Vector? Write its formula.
  • What are Rectangular Components Of A Vector? Explain.
  • Write a note on Vector addition by rectangular components
  • Determination of Angle by rectangular components
  • What is Scalar/Dot product? Explain its characteristics.
  • What is Vector/Cross product? Explain its characteristics
  • What Is Torque? Calculate The Torque Acting On Rigid Body.
  • What is Equilibrium of forces? Define its types and conditions.
  • Why do you keep your legs far apart when you have to stand in the aisle of a bumpy riding bus? 
  • Define the terms (i) unit vector (ii) Position vector and (iii) Components of a vector?
  • The vector sum of three vectors gives a zero resultant. What can be the orientation of the vectors? 
  • Vector A lies in the xy plane. For what orientation will both of its rectangular components be negative? For what orientation will its components have opposite signs?
  • If one of the components of a vector is not zero, can its magnitude be zero? Explain.
  • Can a vector have a component greater than the vector’s magnitude?
  • Can the magnitude of a vector have a negative value?
  • If A + B = 0, what can you say about the components of the two vectors?
  • Under what circumstances would a vector have components that are equal in magnitude?
  • Is it possible to add a vector quantity to a scalar quantity? Explain.
  • Can you add zero to a null vector?
  • Two vectors have unequal magnitudes. Can their sum be zero? Explain.  
  • Show that the sum and difference of two perpendicular vectors of equal lengths are also perpendicular and of the same length?
  • How would the two vectors of the same magnitude have to be oriented, were to be combined to give a resultant equal to a vector of the same magnitude?
  • The two vectors to be combined have magnitudes 60N and 35N. Pick the correct answer from those given below and tell why it is the only one of the three that is correct. (i)100N (ii)70N (iii)20N.
  • Suppose the sides of a closed polygon represent vector-arranged head to tail. What is the sum of these vectors?
  • Identify the correct answer:
  • If all the components of the vectors A1*A2 and were reversed, how would this alter A1 *A2 ?
  • Name the three different conditions that could make A1 *A2 = 0.
  • A picture is suspended from a wall by two strings. Show by diagram the configuration of the strings for which the tension in the strings will be minimum.
  • Suppose, in a rectangular coordinate system, a vector A has its at the point P (-2, -3) and its tip at Q (3,9). Determine the distance between these two points.
  • A certain corner of a room is selected as the origin of a rectangular coordinate system, If an insect is sitting on an adjacent wall at a point having coordinates (2,1), where the units are in meters, what is the distance of the insect from this corner the room?
  • What is the unit vector in the direction of the vector
  • A load of 10.0N is suspended from a clothes line. This distorts the line so makes an angle of 15o with the horizontal at each end. Find the tension in the clothes line.  

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