Question
A 50 -lb force is applied to the control perlal ns shown. The force lies in a plane parallel to the $x-z$ plane and is perpendicular to $B C$. Determine the moments of this force about point $O$ and about the shnt $O A$.Ans, $\mathbf{M}_{O}=-90.6 i-690 \mathbf{j}-338 \mathbf{k}$ lb-in.$M_{O A}=-690 \mathrm{lb}-\mathrm{in}$.Problem 2/121
Step 1
We are given the coordinates of points B and C as follows: B(6, 0, 0) and C(0, 12, 0) The position vectors of points B and C are: $\mathbf{r}_B = 6\mathbf{i}$ $\mathbf{r}_C = 12\mathbf{j}$ Show more…
Show all steps
Your feedback will help us improve your experience
Dominador Tan and 84 other educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Two forces, both in the $x-y$ plane, act on a $3.25-\mathrm{kg}$ mass that accelerates at $5.48 \mathrm{~m} / \mathrm{s}^{2}$ in a direction $38.0^{\circ}$ counterclockwise from the $x$-axis. One force has magnitude $8.63 \mathrm{~N}$ and points in the $+x$-direction. Find the other force.
Two forces, both in the $x$ -y plane, act on a $3.25-$ kg mass that accelerates at $5.48 \mathrm{m} / \mathrm{s}^{2}$ in a direction $38.0^{\circ}$ counterclockwise from the $x$ -axis. One force has magnitude $8.63 \mathrm{N}$ and points in the $x-$ direction. Find the other force.
An object has several forces acting on it. One force is $\overrightarrow{\boldsymbol{F}}=\alpha x \hat{\imath},$ a force in the $x$ -direction whose magnitude depends on the position of the object. (See Problem $6.96 . )$ The constant is $\alpha=2.00 \mathrm{N} / \mathrm{m}^{2} .$ The object moves along the following path: (1) It starts at the origin and moves along the $y$ -axis to the point $x=0$ , $y=1.50 \mathrm{m} ;(2)$ it moves parallel to the $x$ -axis to the point $x=1.50 \mathrm{m}, y=1.50 \mathrm{m} ;(3)$ it moves parallel to the $y$ -axis to the point $x=1.50 \mathrm{m}, y=0 ;(4)$ it moves parallel to the $x$ -axis back to the origin. (a) Sketch this path in the $x y$ -plane. (b) Calculate the work done on the object by $\overrightarrow{\boldsymbol{F}}$ for each leg of the path and for the complete round trip. (c) Is $\overrightarrow{\boldsymbol{F}}$ conservative or nonconservative? Explain.
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD