King Fahd University of Petroleum & Minerals Mechanical Engineering Dynamics ME 201 BY Dr. Meyassar N. Al-Haddad Lecture # 37

Chapter 14 Kinetics of a Particle ; Work & Energy Objectives –To apply the principle of work and energy and apply it solve problems that involve force, velocity, and displacement.

TranslationRotation General

The work of a force F S F

Work of a Spring Force

The Work of a couple

Principle of Work and Energy

Work and Energy relation Initial K.E + Work Done = Final K.E

m =10 kg M = 50 Nm P = 80N, unstretched 0.5 m total work ? Example 18-2

Principle of Work and Energy Translation Rotation

Example 18-3 Start from rest m = 30 kg  = ? Number  = 20 rad/s Using Work & Energy

Example 17-9 Start from rest m = 30 kg  =? Number  = 20 rad/s Pine reaction

Example 18-5

Example 18-6 m=10 kg Rest  =0 P=50 N  =? At  =45 Neglect friction And mass of blocks