![]() ![]() ![]() Every moving object possesses kinetic energy. See Also: NCERT Solutions for Class 9 Science Chapter 11 – Work and Energyġ: What is the kinetic energy of an object?Īnswer: Kinetic energy is the energy possessed by a body by the virtue of its motion. Class 9th Science solutions Chapter 11: Work and Energy Hence, 2100 J of work is done in plowing the length of the field. How much work is done in ploughing the length of the field?Īnswer: Work done by the bullocks is given by the expression: (ii) There is a displacement of the body caused by the applied force along the direction of the applied force.Ģ: Write an expression for the work done when a force is acting on an object in the direction of its displacement.Īnswer: When a force F displaces a body through a distance S in the direction of the applied force, then the work done W on the body is given by the expression:Īnswer: 1 J is the amount of work done by a force of 1 N on an object that displaces it through a distance of 1 m in the direction of the applied force 80.Ĥ: A pair of bullocks exerts a force of 140 N on a plow. ![]() Answer: When a force F acts on an object to displace it through a distance S in its direction, then the work done W on the body by the force is given by:Īnswer: Work is done whenever the given conditions are satisfied: ![]()
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