Newton's Laws of Motion and Fundamental Forces, Slides of Physics

Download Newton's Laws of Motion and Fundamental Forces and more Slides Physics in PDF only on Docsity! Summary : 4. Newton's Laws Docsity.com Newton’s 1st law of motion (definition of inertia) : Newton’s 2nd law of motion : net d d t  p F Newton’s 3rd law (conservation of momentum) : Normal force n : contact force acting normal to contact surface. m in f = m a is the inertia mass. Weight = force of gravity on mass: mw g 0net const  F v m is gravitational mass ab ba F F inertial frame only Special Cases Docsity.com 1. Identify all forces on object 2. Skier reduces to dot 3. Draw forces as vectors on dot Force from ground n Gravity Fg Free-body diagram n Fg Docsity.com Example 4.4. Pushing Books 2 books lie on frictionless horizontal surface. You push with force F on book of mass m1 , which in turn pushes on book of mass m2. What force does the 2nd book exert on the 1st ? 1 2m m   FaAcceleration of books : 12 2mF aNet force on 2 nd book : 21 12 F F 2 1 2 m m m   F Force exerted by 2nd book on the 1st 2 1 2 m m m    F Docsity.com Normal force n : contact force acting normal to contact surface. 3rd law also applies to non-contact forces such as gravity. Not a 3rd law pair Normal force Fnet  0 Docsity.com