MCQ - CBSE Class 9 Science The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why? 10/03/2023 Ajit kumar 84 Views 0 Comments Read more
MCQ - CBSE Class 9 Science (a) Define one watt. (b) A lamp consumes 1000 J electrical energy in 10 s. What is its power 10/03/2023 Ajit kumar 62 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Define work. How is work measured? When is work done by a force negative? 10/03/2023 Ajit kumar 72 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Given below are a few situations, study them and state in which of the given cases work is said to be done. Give reason for your answer: 10/03/2023 Ajit kumar 71 Views 0 Comments Read more
MCQ - CBSE Class 9 Science State the type of energy transformation in the following cases: 10/03/2023 Ajit kumar 69 Views 0 Comments Read more
MCQ - CBSE Class 9 Science A spring which has been kept compressed by tying its ends together is allowed to be dissolved in an acid. What happens to the potential energy of the spring ? 10/03/2023 Ajit kumar 61 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Mountains roads rarely go straight up but wind up gradually. Why? 10/03/2023 Ajit kumar 94 Views 0 Comments Read more
MCQ - CBSE Class 9 Science A man rowing a boat upstream is at rest with respect to the shore. Is he doing work? 10/03/2023 Ajit kumar 79 Views 0 Comments Read more
MCQ - CBSE Class 9 Science A body moves along a circular path. How much work is done in doing so? Explain. 10/03/2023 Ajit kumar 76 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Is it possible that a body be in accelerated motion under a force acting on the body, yet no work is being done by the force ? Explain your answer giving a suitable example. 10/03/2023 Ajit kumar 77 Views 0 Comments Read more