How Forces Affect Motion — Class 9 Science NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 9 Science chapter "How Forces Affect Motion" — 8 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 9 Science chapter "How Forces Affect Motion" — 8 important questions with detailed answers for CBSE board…
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Key Questions Covered:
- State Newton's First Law of Motion.
- What is inertia? Give an example.
- State Newton's Second Law of Motion and write its formula.
- + 5 more questions in the full chapter
Solutions Summary:
| Question | Status |
|---|---|
| State Newton's First Law of Motion. | ✓ Solved |
| What is inertia? Give an example. | ✓ Solved |
| State Newton's Second Law of Motion and write its formula. | ✓ Solved |
Showing 3 of 8 questions
Q1: State Newton's First Law of Motion.
An object at rest remains at rest, and an object in motion continues moving in a straight line at constant velocity unless acted upon by an external force. This is the law of inertia.
Q2: What is inertia? Give an example.
Inertia is the tendency of an object to resist changes in its state of motion or rest. A car suddenly stopping causes passengers to lurch forward (they tend to continue moving). Heavier objects have greater inertia.
Q3: State Newton's Second Law of Motion and write its formula.
The acceleration of an object is directly proportional to the applied force and inversely proportional to its mass.
Formula: F = ma
Where F = force (N), m = mass (kg), a = acceleration (m/s²)
Showing 3 of 8 questions. Visit the full page for complete solutions.