This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: ~ v r = ~ v 2-~ v 1 where v r is relative velocity of object 2 with respect to object 1. 2 2. Unit V. (a) gravity Gravitational force = mg , where g is gravitational acceleration. ( g = 9 . 8 m/s 2 ) SI unit of force : [ N ]=[ kg m/s 2 ] (b) Newtons 1st Law (c) Newtons 2nd Law ~ F = m~a (d) Newtons 3rd Law : Action-reaction 3. Unit VI. (a) Work W = ~ F ~ d = F || d = Fd || where F || is the component of force parallel to the displacement. SI unit of Work and Energy : [J] = [N m] = [ kgm/s 2 m ] = [ kg ( m/s ) 2 ] (b) Kinetic Energy K . E . = 1 2 mv 2 (c) Potential Energy(gravitational potential energy) P . E . = mgh (d) Energy Conservation Law : K.E. + P.E. = constant. TotalEnergy = 1 2 mv 2 + mgh = constant (e) Power P = W t 3...
View Full Document
- Spring '08