3 Questions
Explain the concept of Newton's First Law of Motion and provide an example.
Newton's First Law of Motion states that an object at rest will stay at rest and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. An example of this is a ball rolling on a smooth surface that continues to roll unless a force, such as friction, stops it.
Describe the relationship between work, energy, and power in the context of physics.
Work is the transfer of energy that results in the application of a force over a distance. Energy is the ability to do work, and power is the rate at which work is done or the rate at which energy is transferred. They are related through the work-energy theorem, which states that the work done on an object is equal to the change in its kinetic energy.
Discuss the principles of floatation and how they relate to the concept of buoyancy.
The principle of floatation states that an object will float if the buoyant force exerted on it by a fluid is equal to the object's weight. This is related to the concept of buoyancy, which is the upward force exerted by a fluid on an object immersed in it. Objects with a density less than the fluid will float, while those with a greater density will sink.
Class 9 Physics Exam: Test your knowledge with 200 questions covering Motion, Force and Newton's Laws, Gravitation, Floatation, Work Energy and Power, and Sound. This exam includes a mix of medium and hard difficulty questions to challenge your understanding of these key concepts. Answers provided for self-assessment.
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