Forces and Newton's Laws

Learning Objectives

  • Understand and know how to do force component

  • Know and understanding different types of forces

  • Understand and is able to explain Newton's first and second laws

  • Know how to find the net force of an object by using the formula of F=ma

Lecture

Introduction of Newton's Law

Newton's First Law

  • Newton's first law states that a body at rest or moving at a constant speed in a straight line will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force

https://mammothmemory.net/physics/newtons-laws-of-motion/newtons-first-law--examples/newtons-first-law-examples.html

Newton's Second Law

  • The Newton's second law states that a net force of an object can be calculated by the formula of F=ma, where F is the net force, m is mass of the object, and a is the acceleration.
  • Source: https://www.thegreatcoursesdaily.com/understanding-newtons-laws-of-motion/

Newton's Third Law

  •  If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.
  • A simpler version is that every action has an equal and opposite reaction.
  • Action = Reaction
  • Source: https://www.wired.com/2013/10/a-closer-look-at-newtons-third-law/