Engineering Mechanics: Dynamics Study (Book and Pearson eText)
14th Edition
ISBN: 9780134116990
Author: Russell C. Hibbeler
Publisher: PEARSON
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Chapter 19.2, Problem 21P
The spool has a weight of 30 lb and a radius of gyration kO = 0.45 ft. A cord is wrapped around its inner hub and the end subjected to a horizontal force P = 5 lb. Determine the spool's angular velocity m 4 s starting from rest Assume the spool rolls without slipping.
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1.3 (A). Define the terms shear stress
and shear strain, illustrating your
answer by means of a simple sketch.
Two circular bars, one of brass and
the other of steel, are to be loaded by a
shear load of 30 kN. Determine the
necessary diameter of the bars (a) in
single shear, (b) in double shear, if the
shear stress in the two materials must
not
exceed 50 MN/m2 and 100 MN/
mZ respectively. C27.6, 19.5, 19.5,
13.8mm.l
11
1.4 (A). Two forkend pieces are to be
joined together by a single steel pin of
25mm diameter and they are
required to transmit 50 kN. Determine
the minimum cross-sectional area
of material required in one branch of
either
fork if the stress in the fork material is
not to exceed 180 MN/m2. What will be
the maximum shear stress in the pin?
C1.39 x 10e4mZ; 50.9MN/mZ.]
10:41
1.2 (A). A steel tube, 25 mm outside
diameter and 12mm inside diameter,
cames an axial tensile load of 40 kN.
What will be the stress in the bar? What
further increase in load is possible if
the stress in the bar is limited to
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Chapter 19 Solutions
Engineering Mechanics: Dynamics Study (Book and Pearson eText)
Ch. 19.2 - Determine the angular momentum of the 100-kg disk...Ch. 19.2 - Determine the angular impulse about point O for t...Ch. 19.2 - If it is subjected to a couple moment of M = (3t2)...Ch. 19.2 - The 300-kg wheel has a rad1us of gyration about...Ch. 19.2 - If rod OA of negligible mass is subjected lo the...Ch. 19.2 - Gears A and B of mass 10 kg and 50 kg have radii...Ch. 19.2 - The 50-kg spool is subjected to a horizontal force...Ch. 19.2 - The reel has a weight of 150 lb and a radius of...Ch. 19.2 - The rigid body (slab) has a mass m and rotates...Ch. 19.2 - At a given Instant, the body has a linear momentum...
Ch. 19.2 - Show that if a slab is rotating about a fixed axis...Ch. 19.2 - The 40-kg disk is rotating at = 100 rad/s. When...Ch. 19.2 - The Impact wrench cons1sts of a slender 1-kg rod...Ch. 19.2 - The airplane is traveling in a straight line with...Ch. 19.2 - The double pulley consists of two wheels which are...Ch. 19.2 - The assembly weighs 10 lb and has a radius of...Ch. 19.2 - The disk has a weight of 10 lb and is pinned at...Ch. 19.2 - The 30-kg gear A has a radius of gyration about...Ch. 19.2 - Determine the angular velocity of the pulley when...Ch. 19.2 - The 40-kg roll of paper rests along the wall where...Ch. 19.2 - The slender rod has a mass m and is suspended at...Ch. 19.2 - The rod of length L and mass m lies on a smooth...Ch. 19.2 - A 4-kg disk A is mounted on arm BC. which has a...Ch. 19.2 - The frame of a tandem drum roller has a weight of...Ch. 19.2 - The 100-lb wheel has a radius of gyration of kG =...Ch. 19.2 - The 4-kg slender rod rests on a smooth floor If it...Ch. 19.2 - The double pulley consists of two wheels which are...Ch. 19.2 - The 100-kg spool is resting on the inclined...Ch. 19.2 - The spool has a weight of 30 lb and a radius of...Ch. 19.2 - The two gears A and B have weights and radii of...Ch. 19.2 - The hoop (thin ring) has a mass of 5 kg and is...Ch. 19.2 - The 30-kg gear is subjected to a force of P =...Ch. 19.2 - The 30-lb flywheel A has a radius of gyration...Ch. 19.2 - If the shaft is subjected to a torque of M = (...Ch. 19.2 - The double pulley consists of two wheels which are...Ch. 19.2 - The crate has a mass mc. Determine the constant...Ch. 19.4 - The turntable T of a record player has a mass of...Ch. 19.4 - The 10-g bullet having a velocity of 800 m/s is...Ch. 19.4 - The 10-g bullet having a velocity of 800 m/s is...Ch. 19.4 - The circular disk has a mass m and is suspended at...Ch. 19.4 - The 80-kg man is holding two dumbbells while...Ch. 19.4 - The platform swing consists of a 200-lb flat plate...Ch. 19.4 - The 2-kg rod ACB supports the two 4-kg disks at...Ch. 19.4 - The satellite has a mass of 200 kg and a radius of...Ch. 19.4 - Disk A has a weight of 20 lb. An inextensible...Ch. 19.4 - The plank has a weight of 30 lb, center of gravity...Ch. 19.4 - The 12-kg rod AB is pinned to the 40-kg disk. If...Ch. 19.4 - A thin rod of mass m has an angular velocity o...Ch. 19.4 - Tests of impact on the fixed crash dummy are...Ch. 19.4 - The vertical shaft is rotating with an angular...Ch. 19.4 - The mass center of the 3-lb ball h3s a velocity of...Ch. 19.4 - Prob. 44PCh. 19.4 - The 10-lb block is sliding on the smooth surface...Ch. 19.4 - Determine the height hat which a billiard ball of...Ch. 19.4 - The pendulum consists of a 15-kg solid ball and...Ch. 19.4 - The 4-lb rod AB is hanging in the vertical...Ch. 19.4 - Determine the largest angular velocity 1 the disk...Ch. 19.4 - The solid ball of mass m is dropped with a...Ch. 19.4 - The wheel has a mass of 50 kg and a radius of...Ch. 19.4 - The wheel has a mass of 50 kg and a radius of...Ch. 19.4 - The rod of mass m and length L is released from...Ch. 19.4 - Prob. 55PCh. 19.4 - A ball having a mass of 8 kg and initial speed of...Ch. 19.4 - A solid ball with a mass m is thrown on the ground...Ch. 19.4 - The pendulum consists of a 10-lb solid ball and...Ch. 19.4 - The cable is subjected to a force of P = (10t2)...Ch. 19.4 - The space capsule has a mass of 1200 kg and a...Ch. 19.4 - The tire has a mass of 9 kg and a rad1us of...Ch. 19.4 - The wheel having a mass of 100 kg and a radius of...Ch. 19.4 - The spool has a weight of 30 lb and a radius of...Ch. 19.4 - Spool B is at rest and spool A is rotating at 6...Ch. 19.4 - A thin disk of mass m has an angular velocity 1...Ch. 19.4 - Prob. 8RP
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- 1.11 (a) A test piece is cut from a brass bar and subjected to a tensile test. With a load of 6.4 kN the test piece, of diameter 11.28 mm, extends by 0.04 mm over a gauge length of 50 mm. Determine: (i) the stress, (ii) the strain, (hi) the modulus of elasticity. (b) A spacer is turned from the same bar. The spacer has a diameter of 28 mm and a length of 250mm. both measurements being made at 20°C. The temperature of the spacer is then increased to 100°C, the natural expansion being entirely prevented. Taking the coefficient of linear expansion to be 18 x 10-6/"C determine: (i) the stress in the spacer, (ii) the compressive load on the spacer. [C.G.] [64MN/m2, 0.0008, 80GN/m2, 115.2 MN/m2, 71 KN.] 10:41arrow_forwardI have attached an image, In that they have mentioned the tolerance of 0.4 for all surfaces. I need to know what's the exact tolerance.arrow_forwardSolve this problem and show all of the workarrow_forward
- Solve this problem and show all of the workarrow_forwardPart A The man pulls on the rope with a force of F = 30 N as shown in (Figure 1). Figure 1.5 m 3 m. 4m 10.5 m 1 of 1 Determine the position vector from O to A. Express the x, y, and z components of the position vector in meters to three significant figures separated by commas. ΜΕ ΑΣΦ vec (TOA). (TOA)y. (TOA)== Submit Request Answer Part B m Determine the position vector from O to B. Express the x, y, and z components of the position vector in meters to three significant figures separated by commas. ΜΕ ΑΣΦ ↓↑ vec (TOB)x, (TOB)y, (TOB) = Submit Request Answer Part C Complete previous part(s) Provide Feedback ? marrow_forward4 Part A The tool is used to shut off gas valves that are difficult to access (Figure 1). Figure 0.25 m 30 0,4 m < 1 of 1 If the force F= {-60i+40j+15k} N is applied to the handle, determine the component of the moment created about the z axis of the valve. Express your answer with the appropriate units. Mz = Value Submit Request Answer Provide Feedback | ? Unitsarrow_forward
- 3. A steam power plant has an average monthly net power delivery of 740 MW over the course of a year. This power delivery is accomplished by burning coal in the boiler. The coal has a heating value of 9150 Btu/lbm. The cost of the coal is $14.20/ton. The overall thermal efficiency of the plant is, nth Wnet Qboiler 0.26 = 26% Determine the annual cost of the coal required to deliver the given average monthly power.arrow_forwardThe cable exerts a force of P = 4 kN at the end of the 8-m-long crane boom. A P 8 m B -x- I'm En ▾ Part A If 0 = 30°, determine the placement x of the boom at B so that this force creates a maximum moment about point O. Express your answer to three significant figures and include the appropriate units. x = 9.81 m Submit Previous Answers ✓ Correct ▾ Part B What is this moment? Express your answer to three significant figures and include the appropriate units. Assume the positive direction is counterclockwise. (Mo) max 43.7 = E ? N Submit Previous Answers Request Answer X Incorrect; Try Again; 28 attempts remaining Enter your answer with a different unit type. Review a list of acceptable units.arrow_forwardFind highest and lowest temperature.arrow_forward
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