PhysicsVector QuantityNCTB পদার্থবিজ্ঞান অধ্যায় ৩ (বল)
Force
Bengali: বল•Pronunciation: ফোর্স•Symbol: \vec{F}
Standard Definition:
An external agency or interaction that changes or tends to change the state of rest or uniform motion of a body.
📐 Mathematical Equation, Units & Dimensions
Defining Mathematical Equation
Standard SI Unit
N (Newton) or kg*m/s^2($N$ (নিউটন) বা $kg\cdot m/s^2$)
Dimensional Analysis
CGS Unit
dyn (ডাইন)
📖 Physical Concept & Comprehensive Explanation
According to Newton's second law, net force equals mass multiplied by acceleration (F = ma). 1 Newton is defined as the force required to accelerate a 1 kg mass at 1 m/s^2. In nature, all forces stem from four fundamental interactions: gravitational, electromagnetic, strong nuclear, and weak nuclear forces.
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Quick Memory Hook:Newton's 3 laws: 1st - Inertia, 2nd - F = ma, 3rd - Action & Reaction
🎯 High-Yield Revision Points
- ✓Formulated mathematically via Newton's 2nd law as F = ma.
- ✓1 N = 10^5 dynes.
- ✓SI unit is Newton (N); dimension is [M L T^-2].
Use Online Solver for Force
Compute step-by-step solutions, verify formulas, and plot interactive diagrams on biggan.me.
❓ Frequently Asked Exam Questions (FAQ)
Common questions in board and competitive entrance examinations
Q1: Define 1 Newton of force.
One Newton is the force that imparts an acceleration of 1 m/s^2 to a mass of 1 kg.
Q2: What are the four fundamental forces of nature?
Gravitational force, electromagnetic force, strong nuclear force, and weak nuclear force.