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 66 Views 0 Comments Read more
MCQ - CBSE Class 9 Science A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force ? Explain your answer. 10/03/2023 Ajit kumar 58 Views 0 Comments Read more
MCQ - CBSE Class 9 Science A battery lights a bulb. Describe the energy changes involved in the process. 10/03/2023 Ajit kumar 67 Views 0 Comments Read more
MCQ - CBSE Class 9 Science An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object? 10/03/2023 Ajit kumar 75 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Look at the activities listed below. 10/03/2023 Ajit kumar 59 Views 0 Comments Read more
MCQ - CBSE Class 9 Science When do we say that work is done? 10/03/2023 Ajit kumar 123 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Multiple Choice Questions 10/03/2023 Ajit kumar 119 Views 0 Comments Read more
MCQ - CBSE Class 9 Science A cube of side 5 cm is immersed in water and then in saturated salt solution. In which case will it experience a greater buoyant force? If each side of the cube is reduced to 4 cm and then immersed in water, what will be the effect on the buoyant force experienced by the cube as compared to the first case for water? Give reason for each case. 10/03/2023 Ajit kumar 77 Views 0 Comments Read more
MCQ - CBSE Class 9 Science A body of mass 100 g is floating water. What will be its apparent weight? Justify your answer. 10/03/2023 Ajit kumar 80 Views 0 Comments Read more