A wooden plank x meters long has one end leaning on top of a vertical wall 1.5 m long and the other end resting on a horizontal ground. Neglecting friction, find x if a force (parallel on the plank) of 100 N is needed to pull a 400 N block up the plank. O 6m 5m O 4m O 3 m

A wooden plank x meters long has one end leaning on top of a vertical wall 1.5 m long and the other end resting on a horizontal ground. Neglecting friction, find x if a force (parallel on the plank) of 100 N is needed to pull a 400 N block up the plank. O 6m 5m O 4m O 3 m

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.78P: The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016,...

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Free Body Diagram

The system of forces acting on a body tends to either rotate it or make the body undergo motion. In general, when an external agent exerts a force on a body, the body undergoes translational motion and rotational motion. The body has six degrees of freedom under the influence of that force. Here, three degrees of freedom are from the translational motion while the other three are from the rotation motion. However, sometimes the bodies are not allowed to undergo any motion and are fixed, under such conditions the body is said to be constrained.

Question

A wooden plank x meters long has one end leaning on top of a vertical wall 1.5 m long and the other end resting on a horizontal ground. Neglecting friction,
find x if a force (parallel on the plank) of 100 N is needed to pull a 400 N block up the plank.
O 6 m
O 5m
4 m
O 3 m

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