Newton2ndlaw

# Newton2ndlaw - 1D/2D Particle Kinetics Newtons 2nd law...

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1D/2D Particle Kinetics – Newton’s 2nd law General approach to solving Newton’s 2nd law problems 1. Identify the motion (the type of motion) and its characteristics . 2. Draw FBD . 3. Set up proper coordinate system based on the motion : a. x-y : horizontal or vertical motion b. x-y : parallel and perpendicular to an incline c. n-t : vertical circular motion d. n - y : horizontal circular motion 4. Apply Newton’s 2nd law in the components form , that is, along the coordinate axes. : : : xx yy nn tt F ma xy F ma F ma nt F ma F ma ny F ma Σ= Additional information is based on forces (friction force formula) and kinematics (acceleration). Example 1. A 75 Kg man standing on a 15 Kg cart exerts a 150 N force on the rope to pull himself up the smooth ramp as shown. If the angle of the incline is θ = 30 ˚, f ind the acceleration of the man. ( Ans : 0.1 m/s 2 ) 2. The small sphere on the smooth inner surface of the spinning cone is observed to move with the cone without sliding along the surface. The small sphere has mass

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## This note was uploaded on 10/02/2011 for the course PHYS 2305 taught by Professor Tschang during the Spring '08 term at Virginia Tech.

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Newton2ndlaw - 1D/2D Particle Kinetics Newtons 2nd law...

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