Force and Newton's Laws of Motion

Translational vs Rotational motion; pivot points and torque.; Conditions for equilibrium: Sum of forces = 0 and sum of moments about any point = 0.

⚡ Essential Formula / LawCore Syllabus Rule

Moment of Force = F × d | F = ma = (dp / dt) | Principle of Moments: Clockwise = Anticlockwise

🎯 High-Yield Syllabus Checkpoints

1Translational vs Rotational motion; pivot points and torque.
2Conditions for equilibrium: Sum of forces = 0 and sum of moments about any point = 0.
3Centripetal force (real force towards center) vs Centrifugal force (fictitious inertial force).

⚠️ Common Student Pitfall

Writing centrifugal force as a reaction to centripetal force (reaction act on different bodies, centrifugal is fictitious).

⚠️ Common Student Pitfall

Using distance along the beam instead of perpendicular distance from the line of action of force to pivot.

Center of Gravity (CG)

The point about which the algebraic sum of moments of weights of all particles constituting the body is zero.

Equilibrium

A state where multiple forces acting on a body produce no change in its state of rest or uniform motion.

Spaced Repetition Protocol:

Day 1Day 3Day 7Day 21