Direction: A quick return mechanism is shown below. The crank OS is driven at 2 rev/s in counter clockwise direction.
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The angular speed of PQ in rev/s when the block R attains maximum speed during forward stroke (stroke with slower speed) is (in rad/s)
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- 1/3
- 2/3
- 2
- 3
Correct Option: B
Maximum speed during forward stroke occur when QR & QS are perpendicular.
V = 250 × 2 = 750 × ωPQ
| ωPQ = | rad/sec | 3 |
