PQRS is a four bar chain with link PS fixed. The lengths of the links are PQ = 62.5 mm ; QR = 175 mm ; RS = 112.5 mm ; and PS = 200 mm. The crank PQ rotates at ω rad/s clockwise. Draw the velocity and acceleration diagram when angle QPS = α and Q and R lie on the same side of PS.ω=49, α=49.

PQRS is a four bar chain with link PS fixed. The lengths of the links are PQ = 62.5 mm ; QR = 175 mm ; RS = 112.5 mm ; and PS = 200 mm. The crank PQ rotates at ω rad/s clockwise. Draw the velocity and
Page 1 of 2 MF 20403 Engineering Mechanics INCL ASS TEST – 1 Time Allowed: One hour 03 July 202 2 INSTRUCTIONS TO CANDIDATE : • The marks allocated to each part have been indicated. You may mange the allowed time accordingly. • Write Your Name and Index Number in the each answer sheets. • Add your index number as the upload ing file name . • You will have additional 05 minutes to upload your answer sheets (PDF version only ). • If there any errors and mistakes in the given questions you may assume reasonable values and proceed. Page 2 of 2 Question 1 PQRS is a four bar chain with link PS fixed. The lengths of the links are PQ = 62.5 mm ; QR = 175 mm ; RS = 112.5 mm ; and PS = 200 mm. The crank PQ rotates at ω rad/s clockwise. Draw the velocity and acceleration diagram when angle QPS = α and Q and R lie on the same side of PS. Find the values for ω and α referring your index number as follows ω- last two digits of your index number α- Last two digits of your index nu mber (Example – For the index number M AN/19 /B2 /99 , ω = 99 rpm, α = 99 o) a) Draw the velocity diagram [40 Marks] b) Draw the acceleration diagram [30 Marks] c) Find the angular velocit ies of links QR and RS. [15 Marks] d) Find the angular acceleration s of links QR and RS. [15 Marks] Total [100 Marks] ================================================================= End of question paper N rpm α