
Concept explainers
The bent rod ABCD rotates about a line joining point A and E with a constant angular velocity of 9 rad/s. Knowing that the rotation is clockwise as viewed from E, determine the velocity and acceleration of corner C.

The velocity and acceleration of corner
Answer to Problem 15.10P
The velocity of corner
The acceleration of corner
Explanation of Solution
Given information:
The angular velocity is
Expression of position vector of point
Here, the distance in
Expression of position vector of point
Here, the distance in
Expression of rotation vector along line
Here, the angular velocity is
Expression of unit vector of point
Here, the magnitude of position vector of point
Expression of magnitude of position vector of point
Here, the distance in
Expression of velocity of point
Here, the rotation vector along the line
Expression of acceleration of point
Here, the rotation vector along the line
Calculation:
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
Here, the Equation (VII) is a cross product of two vectors. Now change it in determinant form
Substitute
Here, the Equation (IX) is a cross product of two vector, now change it in determinant form.
Conclusion:
The velocity of corner
The acceleration of corner
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Chapter 15 Solutions
Vector Mechanics for Engineers: Dynamics
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