Newton's Second Law

• Newton’s second law states that the acceleration of an object is proportional to the resultant force acting on the object, and inversely proportional to the mass of the object
• $F=$$ma$

  • Resultant force (F) in newtons (N)
  • Mass (m) in kilograms (kg)
  • Acceleration (a) in metres per second squared (m/s$^2$)
• Inertial mass is a measure of how difficult it is to change the velocity of an object
• Inertial mass is defined as the ratio of force over acceleration as $m=$$\frac F a$