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Solution: When a force F acts on an object to move it in its direction through a distance S, work is done. The work on the body is done by force. Work done = Force × Displacement. W = F × S. Where, F = 7 N S = 8 m. So, work done, W = 7 × 8. W = 56 Nm. W = 56 J. Exercise-11.2 Page: 149. 1. When do we say that work is done? Solution:
Work done by a force acting on an object is equal to the magnitude of the force multiplied by the distance moved in the direction of the force. Work has only magnitude and no direction. Similarly, we often use the term energy in our daily life; this also has a different definition in science.
23 sty 2024 · Two conditions need to be satisfied for work to be done: (i) A force should act on object (a) The object must be displaced Work = Force x Displacement Unit of workdone = Joule = Newton x metre 1 Joule work is said to be done when 1 Newton force is applied on an object and it shows the displacement by 1 meter.
Get NCERT Solutions, Notes, Answers to Questions inside the Chapters, Activities, Solved Examples of Chapter 11 Class 9 Work and Energy free at Teachoo. We provide you the best content to get great marks in Exams! This chapter comes under Physics Class 9, and in addition to the concepts and questions we have
Q1. When do we say that work is done? Work is said to be done when a force causes displacement of an object in the direction of applied force. Q2. Write an expression for the work done when a force is acting on an object in the direction of its displacement. Work done = Force x Displacement. Q3. Define 1J of work.
Two conditions must be met for work to occur: A force must be exerted on the object.
Question 1: When do we say that work is done? Answer: Work is completed whenever the given conditions are satisfied: (i) A force acts on the body. (ii) There’s a displacement of the body caused by the applied force on the direction of the applied force.
