lecture6 - Newtons Laws of Motion Newtons Newtons Laws...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Newton’s Laws of Motion Newton’s Laws of Motion Newton’s Laws Forces Mass and Weight Serway and Jewett 5.1 to 5.6
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Newton’s First Law (Law of Inertia ) An isolated object, free from external forces, will continue moving at constant velocity, or remain at rest. Earlier, Aristotle said objects were “naturally” at rest, and needed a continuing push to keep moving. Galileo realised that motion at constant velocity is “natural”, and only changes in velocity require external causes. (This law was actually due to Galileo.) Objects in equilibrium (no net external force) also move at constant velocity.
Background image of page 2
Forces A force is a push or pull that tends to cause motion (more exactly, changes in motion) From the Second Law, force should have units of Force is a vector. In Newton’s dynamics, all influences on a particle from its surroundings are expressed as forces exerted on that particle. (N) newton 1 m/s kg 1 2 =
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
F net (or F total ) is the vector sum of all forces acting on the particle of mass m: The acceleration a is parallel to the total force, and proportional to it. The proportionality constant is the particle’s mass . Newton defines mass as a measure of an object’s
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 18

lecture6 - Newtons Laws of Motion Newtons Newtons Laws...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online