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TORQUE AND COUPLE _ PART 01

For more information: http://www.7activestudio.com [email protected] http://www.7activemedical.com/ [email protected] http://www.sciencetuts.com/ [email protected] Contact: +91- 9700061777, 040-64501777 / 65864777 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. Torque& Couple:Objectives: To know the knowledge and understanding the concept of ‘torque’. Now we shall discuss about ‘Torque’.Torque:Look at this example,When a toy bus is held firmly by placing a finger on its top and a horizontal force is applied at one of the ends of the toy such that the force is perpendicular to its length, it starts rotating about the fixed finger.Look at this example,Consider the door of your class room and try to turn or rotate it by applying force at various points on the door.We find it difficult, if the point of application of force is nearer to the axis of rotation or hinges.And if the force is applied exactly on the hinges, the door cannot move.Look at this example,Have you observed that, a tight wheel nut cannot be unscrewed by the bare hand but the same can be done quite easily using a jockey rod or a spanner?These examples suggest that rotating effect is decided not only by the magnitude of applied force but also perpendicular distance of the force. when lever arm length is doubled it is seen that the effort of force required to turn the nut is halved.Moreover, if direction of force is reversed, the sense of rotation will also be reversed.Further analysis reveals another interesting point. If ‘F’ is applied parallel to lever arm of spanner it is observed that there is no turning effect”.And if F is applied at an angle ‘θ’ to lever arm, the component ‘ Fsinθ’ alone participates in rotating the system.Hence the rotational analogue of force is moment of force .It is also referred to as torque.