Force — definition?
An external agent that changes motion or rest.
Contact forces — example?
Normal force exerted by surfaces.
Newton’s First Law — principle?
An object stays at rest or in uniform motion unless acted upon.
F = ma — meaning?
Force equals mass times acceleration.
Third Law — statement?
Every action has an equal and opposite reaction.
Friction — types?
Static and kinetic friction.
Static friction — role?
Prevents initial movement of surfaces.
Equilibrium — condition?
Net force and torque are zero.
Field forces — example?
Gravitational force acts at a distance.
Fundamental forces — examples?
Strong nuclear, electromagnetic, weak nuclear, gravitational.
Answer 5 questions on Fundamentals of Force and Motion.
1. What is the concept of force primarily understood to be in physics?
2. How does the fundamental nature of gravitational force differ from that of the normal force?
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