Velocity and Acceleration analysis

2. • Relative Velocity Method for Velocity analysis
• Acceleration in Mechanisms
Summary of previous lecture

3. Today’s lecture
• Numerical problem for velocity and
acceleration diagram

4. Set square, compass, protractor, pencil etc.

5. Problem
Find out the acceleration of the slider D and
the angular acceleration of link CD for the
engine mechanism shown fig. The crank OA
rotates uniformly at 180 r.p.m. in clockwise
direction. The various lengths are: OA = 150
mm ; AB = 450 mm; PB = 240 mm ; BC =
210 mm ; CD = 660 mm.
This is a solved problem (Example 8.7) from
Theory of machines by R.S. Khurmi
So you can ref. the book.

6. ProblemScale
100 mm : 1 cm
Scale
2.83 m/s : 2.83 cm

7. Problem: Velocity diagram

8. Problem: Acceleration diagram

9. Problem: Acceleration diagram

10. Next lecture
• Cams

11. Contact details:
Rohit Kumar Singla
Email ID: rohit.kumar@thapar.edu