Frequently Tested Topics:

  • Effects of Force on a Rigid Body

  • Definition and Concept of Couple, Moment of a Couple

  • Definition and Concept of Equilibrium

  • Principle of Moments (IMPORTANT)

  • Factors Affecting Center of Gravity

  • Position of Center of Gravity of Regular Objects (with diagrams)

  • Definition and Concept of Uniform Circular Motion

  • Difference Between Centripetal and Centrifugal Force

*Note that other aspects of the chapter are equally important.

Important Past Questions:

  • Name the various forces acting on the body in the diagram/Draw a diagram showing the various forces acting on the specified body. (2013, 2015, 2016, 2017)


When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall.
(i)  Name the force exerted by the table top.
(ii) What is the direction of the force?

  • Numericals based on principle of moments. (2011, 2017)

  • Is it possible to have an accelerated motion with a constant speed? Explain. (2014)

  • Differentiate between centripetal and centrifugal force with respect to their direction of action. (2013, 2016)

  • How does uniform circular motion differ from uniform linear motion? (2017)

  • Explain the motion of a planet around the sun in a circular orbit. (2015)