- #1
MarkL
- 34
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From B&J Chap 15
Rods A and B are attached to a wall and point to the right.
A collar with pin P moves freely on Rod A.
Rod A is positioned horizontally.
Rod B is 500mm below Rod A and angled 30 degrees up with the wall.
Pin P is attached to a slot in Rod B. Pin P moves freely in the slot.
Determine the velocity of the pin if the angular velocity of:
Rod A is 8 rad/sec clockwise
Rod B is 3 rad/sec clockwise
Answer : 2.4 m/s, 73.9 degrees down and right
I calculated the relative velocity of the pin for each rod separately.
I get the right direction but the wrong magnitude. Go figure.
I have no problem when the pin moves freely on only one rod.
What is the trick when the pin is free to move on both rods.
Thank you
Mark
Rods A and B are attached to a wall and point to the right.
A collar with pin P moves freely on Rod A.
Rod A is positioned horizontally.
Rod B is 500mm below Rod A and angled 30 degrees up with the wall.
Pin P is attached to a slot in Rod B. Pin P moves freely in the slot.
Determine the velocity of the pin if the angular velocity of:
Rod A is 8 rad/sec clockwise
Rod B is 3 rad/sec clockwise
Answer : 2.4 m/s, 73.9 degrees down and right
I calculated the relative velocity of the pin for each rod separately.
I get the right direction but the wrong magnitude. Go figure.
I have no problem when the pin moves freely on only one rod.
What is the trick when the pin is free to move on both rods.
Thank you
Mark