Direction: An instantaneous configuration of a four-bar mechanism, whose plane is horizontal, is shown in the figure below. At this instant, the angular velocity and angular acceleration of link O2A are ω = 8 rad/s and α = 0, respectively, and the driving torque (τ) is zero. The link O2A is balanced so that its centre of mass falls at O2.
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At the instant considered, what is the magnitude of the angular velocity of O4B?
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- 1 rad/s
- 3 rad/s
- 8 rad/s
- 64/3 rad/s
Correct Option: B
| = | = | |||
| ω2 | I14I24 | 240 + 144 |
| = | ||
| 8 | 384 |
| ∴ ω4 = | × 8 = 3 rad/s | |
| 384 |
