CBSE Class 9 > Class 9 Notes > Science New NCERT 2026-27 (New Syllabus) > PPT: How Forces Affect Motion
PPT: How Forces Affect Motion
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FAQs on PPT: How Forces Affect Motion
| 1. What is the definition of force in the context of motion? |  |
Ans. A force is a push or a pull acting upon an object, which can cause it to change its velocity, thereby affecting its motion. Forces can be classified as contact forces, like friction and tension, or non-contact forces, such as gravitational and magnetic forces.
| 2. How does Newton's first law of motion relate to forces and motion? | |
Ans. Newton's first law of motion states that an object at rest will remain at rest, and an object in motion will continue in motion at a constant velocity, unless acted upon by a net external force. This law illustrates that forces are necessary to change the state of motion of an object.
| 3. What is the role of friction as a force affecting motion? | |
Ans. Friction is a contact force that opposes the relative motion between two surfaces in contact. It plays a crucial role in everyday motion, as it enables objects to start moving, stop, or change direction. Without friction, objects would slide indefinitely without slowing down.
| 4. Can you explain the concept of balanced and unbalanced forces? | |
Ans. Balanced forces occur when two or more forces acting on an object are equal in size and opposite in direction, resulting in no change in the object's motion. Unbalanced forces, on the other hand, cause a change in motion, as they are not equal and can accelerate or decelerate an object.
| 5. How do mass and acceleration relate to force according to Newton's second law? | |
Ans. According to Newton's second law of motion, the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = m × a). This means that for a given force, an increase in mass will result in a decrease in acceleration, and vice versa, highlighting the relationship between these three physical quantities.
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Apr 25, 2026 Last updated
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Document Description: PPT: How Forces Affect Motion for Class 9 2026 is part of Science Class 9 New NCERT 2026-27 (New Syllabus) preparation. The notes and questions for PPT: How Forces Affect Motion have been prepared according to the Class 9 exam syllabus. Information about PPT: How Forces Affect Motion covers topics like and PPT: How Forces Affect Motion Example, for Class 9 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for PPT: How Forces Affect Motion.
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