# Power transmission velocity

(See attached file for full problem description)

A four car linkage is shown in the attachment. The crank OA, the connecting rod AB, and the rocker BC are 20mm, 120mm, and 60mm long respectively. The crank rotates at a speed of 60 rpm and the centre distance OC is 90mm. At the instant shown determine:

(I) The velocity of C

(II) The angular velocity of the rocker BC

(III) The angular velocity of the connecting rod AB

https://brainmass.com/engineering/mechanical-engineering/power-transmission-velocity-84550

#### Solution Preview

Please see the attached file.

Problem:

A four-bar linkage is shown below. The crank OA, the connecting rod AB and the bar BC are 20mm, 120mm and 60mm long, respectively. The crank rotates at a speed of 60 rpm and the centre distance OC is 90mm.

At the instant shown, determine:

1) The velocity of B

2) The angular velocity of BC

3) The angular velocity of the connecting rod AB.

Solution:

Remark: in the original text of problem, first question refers to point C, but it cannot be like that, because C is fix (like point O) and the ...

#### Solution Summary

The solution calculates the angular velocity for various parts of a car including the crank, the connecting rod, and the rocker.