1. Kinematics of a Rigid Body: Basic Concepts
Particle vs. Rigid body
Planar motion vs. Spatial motion
Type of planar motions
ME 316 Handout 1

2. Review: Planar Kinematics of a Rigid Body
1. Particle Versus Rigid Body A B
Particle: A & B have the same motion A B
Rigid body: A and B may have different motions
ME 316 Handout 1

3. 2. Planar motion vs. Spatial motion
Example 1
ME 316 Handout 1

4. Example 2
ME 316 Handout 1

5. Spatial motion - Example
ME 316 Handout 1

6. Planar motion – Scientific Definition
All particles of a rigid body move along paths which are equidistant from a fixed plane, the body is said to undergo planar motion
A body system consists of several rigid bodies. When all rigid bodies undergo planar motion, the system is said to undergo planar motion
ME 316 Handout 1

7. 3. Types of planar motion
Translation
ME 316 Handout 1

8. 3. Types of planar motion Rotation at a fixed axis
Planar general motion
ME 316 Handout 1

9. Types of planar motion – Scientific definition
Translation: every line segment on the body remains parallel to its original direction during the motion
Rotation about a fixed axis: all the particles move along circular paths
General plane motion: a combination of translation and rotation.
ME 316 Handout 1