- #1
Andrew1234
- 18
- 1
- Homework Statement
- Explain the relationship between the angular and linear velocities of the panel when the door is fully open, that is, when point E strikes the floor.
- Relevant Equations
- Work energy principle
If an analogy is drawn to kinematics problems in which for example a ball is thrown from a height h, when it strikes the floor it has a final velocity although it stops moving instantaneously. But in this problem, the points B and D have no linear velocity when E strikes the floor. Their final angular velocities, on the other hand, are equal and nonzero. I don't understand the reason for this discrepancy. At the instant both panels stop moving linearly they should also have no angular velocity. Also, using the analogy of the ball, if an object thrown from a height h has a final linear velocity although it too stops moving in an instant I don't see how the motion of the panels differs in this respect, since they too have a final linear and angular velocity, both of which should instantaneously become zero.