At full draw, an archer applies a pull of 130 N to the bowstring of the bow shown in the figure. Determinethe bending moment at the midpoint of the bow.70°1400 mm+350 mm→ A simple beam with a rectangular cross-section ( width ,90 mm ; height, 300 mm ) carries a trapezoidallydistributed load of 20 kN/m at A and 15 kN/m at B on a span of 4.2 m (see figure) . Find the principal stresses0j and o, and the maximum shear stress Tmax at cross section 0.6 m from the left-hand support at 50 mmabove the neutral axis.20 kN/m15 kN/m300 mmB90 mm|0.6 m4.2 m

Ans1) Given- Pull=130Kn The diagram is given below-

Answered: At full draw, an archer applies a pull…

At full draw, an archer applies a pull of 130 N to the bowstring of the bow shown in the figure. Determine the bending moment at the midpoint of the bow.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

System of Forces

A force is an external influence or agent that changes the state of a system. According to Newton's second law, the force applied to a body is proportional to the change in momentum of a body. Hence, whenever a force is applied to a body, its momentum changes. If the body is at rest, under the action of force, its state of rest changes to motion. In other words, the magnitude of the momentum of the body changes from zero to a measurable value. Similarly, if the body possesses some initial velocity, it has some associated momentum, the effect of force can cause the body to halt or come to rest, that is, the momentum reduces to zero.

Question

100%

At full draw, an archer applies a pull of 130 N to the bowstring of the bow shown in the figure. Determine
the bending moment at the midpoint of the bow.
70°
1400 mm
+350 mm→

A simple beam with a rectangular cross-section ( width ,90 mm ; height, 300 mm ) carries a trapezoidally
distributed load of 20 kN/m at A and 15 kN/m at B on a span of 4.2 m (see figure) . Find the principal stresses
0j and o, and the maximum shear stress Tmax at cross section 0.6 m from the left-hand support at 50 mm
above the neutral axis.
20 kN/m
15 kN/m
300 mm
B
90 mm
|0.6 m
4.2 m

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