EP ENGR.MECH.:DYNAMICS-REV.MOD.MAS.ACC.
14th Edition
ISBN: 9780133976588
Author: HIBBELER
Publisher: PEARSON CO
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Textbook Question
Chapter 16.6, Problem 87P
If rod CD is rotating with an angular velocity ωCD = 4 rad/s, determine the angular velocities of rods AB and CB at the instant shown.
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Students have asked these similar questions
The gears shown in the figure have a diametral pitch of 2 teeth per inch and a 20° pressure angle.
The pinion rotates at 1800 rev/min clockwise and transmits 200 hp through the idler pair to gear
5 on shaft c. What forces do gears 3 and 4 transmit to the idler shaft?
TS
I
y
18T
32T
This
a
12
x
18T
C
48T
5
Question 1. Draw 3 teeth for the following pinion and gear respectively. The teeth
should be drawn near the pressure line so that the teeth from the pinion should
mesh those of the gear. Drawing scale (1:1). Either a precise hand drawing or
CAD drawing is acceptable. Draw all the trajectories of the involute lines and the
circles.
Specification: 18tooth pinion and 30tooth gear. Diameter pitch=P=6 teeth /inch.
Pressure angle:20°, 1/P for addendum (a) and 1.25/P for dedendum (b). For fillet,
c=b-a.
5. The figure shows a gear train. There is no friction at the bearings except for the gear tooth forces.
The material of the milled gears is steel having a Brinell hardness of 170. The input shaft speed (n2)
is 800 rpm. The face width and the contact angle for all gears are 1 in and 20° respectively. In this
gear set, the endurance limit (Se) is 15 kpsi and nd (design factor) is 2.
(a) Find the revolution speed of gear 5.
(b) Determine whether each gear satisfies the design factor of 2.0 for bending fatigue.
(c) Determine whether each gear satisfies the design factor of 2.0 for surface fatigue (contact stress).
(d) According to the computation results of the questions (b) and (c), explain the possible failure
mechanisms for each gear.
N4=28
800rpm
N₁=43
N5=34
N₂=14
P(diameteral pitch)=8 for all gears
Coupled to 2.5hp motor
Chapter 16 Solutions
EP ENGR.MECH.:DYNAMICS-REV.MOD.MAS.ACC.
Ch. 16.3 - Determine its constant angular acceleration and...Ch. 16.3 - Determine the angular acceleration when it has...Ch. 16.3 - Determine the time it takes to achieve an angular...Ch. 16.3 - If the angular displacement of the wheel is =...Ch. 16.3 - Determine the magnitude of the velocity and...Ch. 16.3 - Determine the velocity of the cylinder and the...Ch. 16.3 - Determine the magnitudes of the velocity and...Ch. 16.3 - If the disk is originally rotating at 0 = 12...Ch. 16.3 - It it is subjected to a constant angular...Ch. 16.3 - If it is subjected to a constant angular...
Ch. 16.3 - Determine the number of revolutions, the angular...Ch. 16.3 - Determine the number of revolutions it must...Ch. 16.3 - Also, find the number of revolutions of gear D to...Ch. 16.3 - Gears A, B, C, and D have radii of 15 mm, 50 mm,...Ch. 16.3 - Determine the magnitude of acceleration of point B...Ch. 16.3 - pulley A is given a constant angular acceleration...Ch. 16.3 - Starting from rest, determine the angular...Ch. 16.3 - If the engine turns pulley A at A = (20t + 40)...Ch. 16.3 - If the engine turns pulley A at A = 60 rad/s,...Ch. 16.3 - Determine the angular velocity of the disk and its...Ch. 16.3 - Determine the magnitudes of the normal and...Ch. 16.3 - Determine the magnitudes of the normal and...Ch. 16.3 - If this gear is initially turning at A = 15 rad/s,...Ch. 16.3 - If this gear is initially turning at A = 15 rad/s,...Ch. 16.3 - Determine the brushs angular velocity when t = 4...Ch. 16.3 - If this gear is initially turning at (A)0 = 20...Ch. 16.3 - Determine the magnitudes of the velocity and the n...Ch. 16.3 - If the motor turns gear A with an angular...Ch. 16.3 - If the motor turns gear A with an angular...Ch. 16.3 - and the meshed pinion gear B on the propeller...Ch. 16.3 - determine the magnitude of the velocity and...Ch. 16.3 - If the gears A and have the dimensions shown,...Ch. 16.3 - and the meshed pinion gear B on the propeller...Ch. 16.3 - and the meshed pinion gear B on the propeller...Ch. 16.3 - If the canisters are centered 200 mm apart on the...Ch. 16.3 - Determine the largest angular velocity of gear B...Ch. 16.3 - The shaft of the motor M turns with an angular...Ch. 16.3 - If A has a constant angular acceleration of A = 30...Ch. 16.3 - If the angular displacement of A it A = (5t3 +...Ch. 16.3 - This gear is connected to gear B, which is fixed...Ch. 16.3 - Express the result in Cartesian vector form.Ch. 16.3 - Determine the velocity and acceleration of point D...Ch. 16.3 - At the instant shown it is rotating about the y...Ch. 16.3 - Determine the magnitudes of the velocity and...Ch. 16.4 - Determine the angular velocity and angular...Ch. 16.4 - Determine the angular acceleration and angular...Ch. 16.4 - Determine the angular acceleration and angular...Ch. 16.4 - Determine the angular velocity and angular...Ch. 16.4 - Determine the angular velocity of the connecting...Ch. 16.4 - The cam rotates with a constant counterclockwise...Ch. 16.4 - The pin connection at O does not cause an...Ch. 16.4 - Determine the velocity of the follower rod AB as...Ch. 16.4 - The pin connection at O does not cause an...Ch. 16.4 - Determine the velocity and acceleration of the peg...Ch. 16.4 - Determine the velocity and acceleration of block...Ch. 16.4 - Determine the angular velocity and angular...Ch. 16.4 - If the slotted arm is causing A to move downward...Ch. 16.4 - If the wedge moves to the left with a constant...Ch. 16.4 - If the rollers do not slip, determine their...Ch. 16.4 - If no slipping occurs between the disk D and the...Ch. 16.4 - Determine the velocity and acceleration of...Ch. 16.5 - If roller A moves to the right with a constant...Ch. 16.5 - Determine the magnitude of the velocity of point B...Ch. 16.5 - The cable wraps around the inner core, and the...Ch. 16.5 - If crank OA rotates with an angular velocity of =...Ch. 16.5 - If rod AB slides along the horizontal slot with a...Ch. 16.5 - Determine the velocity of the peg at B at this...Ch. 16.5 - Determine the velocity of point B at this instant.Ch. 16.5 - If the block at C is moving downward at 4 ft/s,...Ch. 16.5 - Determine the velocity of block C and the angular...Ch. 16.5 - Determine the angular velocities of links A B and...Ch. 16.5 - Also, sketch the position of link BC when = 55,...Ch. 16.5 - Link BC rotates clockwise with an angular velocity...Ch. 16.5 - If the angular velocity of link AB is AB = 3...Ch. 16.5 - Determine the velocity of the gear rack C.Ch. 16.5 - If B is moving to the right at 8 ft/s and C is...Ch. 16.5 - Determine the angular velocity of the gear and the...Ch. 16.5 - Determine the velocity of point A on the rim of...Ch. 16.5 - Link CB is horizontal at this instant.Ch. 16.5 - Determine the velocity of the slider C at the...Ch. 16.5 - Determine the velocity of block C and the angular...Ch. 16.5 - If AB has an angular velocity AB = 8 rad/s,...Ch. 16.5 - If the slider block A is moving downward at vA = 4...Ch. 16.5 - If the slider block A is moving downward at A = 4...Ch. 16.5 - This gear has an inner hub C which is fixed to B...Ch. 16.5 - If link AB is rotating at AB =3 rad/s, determine...Ch. 16.5 - If link CD is rotating at CD = 5 rad/s, determine...Ch. 16.5 - By locking or releasing certain gears, it has the...Ch. 16.5 - If the ring gear A rotates clockwise with an...Ch. 16.5 - It consists of a driving piston A, three links,...Ch. 16.5 - Because of the rotational motion of lint AB and...Ch. 16.6 - Establish the location of the instantaneous center...Ch. 16.6 - Determine the angular velocity of the rod and the...Ch. 16.6 - Determine the angular velocity of link BC and...Ch. 16.6 - The gear rack B is fixed.Ch. 16.6 - If cable AB is unwound with a speed of 3 m/s, and...Ch. 16.6 - Determine the angular velocity of link BC and the...Ch. 16.6 - Determine the angular velocity of links BC and CD...Ch. 16.6 - Assume the geometry is known.Ch. 16.6 - Determine the angular velocity of link AB at the...Ch. 16.6 - Determine the angular velocity of the link CB at...Ch. 16.6 - Determine the velocities of the cylinders center C...Ch. 16.6 - Determine the velocities of points A and B on the...Ch. 16.6 - Determine the velocities of points A and B.Ch. 16.6 - If rod CD is rotating with an angular velocity CD...Ch. 16.6 - If bar AB has an angular velocity AB = 6 rad/s,...Ch. 16.6 - Under these conditions, what is the speed at A if...Ch. 16.6 - Due to slipping, points A and B on the rim of the...Ch. 16.6 - Determine the velocities of the center point C and...Ch. 16.6 - Determine the velocity of point D and the angular...Ch. 16.6 - Determine the velocity of point P, and the angular...Ch. 16.6 - If connected bar CD is rotating with an angular...Ch. 16.6 - Determine the speeds of points A, B, and C caused...Ch. 16.6 - Determine the velocity of the gear rack C.Ch. 16.6 - If the hub gear H and ring gear R have angular...Ch. 16.6 - What is the angular velocity of the spur gear?Ch. 16.6 - Determine the angular velocity of rod CD at the...Ch. 16.6 - If bar CD is rotating with an angular velocity of...Ch. 16.6 - If the link rotates about the fixed point B at 4...Ch. 16.7 - if the sun gear D is rotating clockwise at D = 5...Ch. 16.7 - The angular velocity is given.Ch. 16.7 - Determine the angular acceleration of the rod and...Ch. 16.7 - Determine the acceleration of point A.Ch. 16.7 - At the instant shown, the center O of the gear...Ch. 16.7 - Determine the angular acceleration of the gear at...Ch. 16.7 - Determine the angular acceleration of link BC at...Ch. 16.7 - Determine the angular acceleration of link BC and...Ch. 16.7 - Determine the velocity sod acceleration of the...Ch. 16.7 - Determine the acceleration of the top of the...Ch. 16.7 - Determine the acceleration of the bottom A of the...Ch. 16.7 - Determine the velocity and acceleration of the...Ch. 16.7 - Determine the velocity and acceleration of the...Ch. 16.7 - At the instant shown, point A has the motion...Ch. 16.7 - Determine the angular velocity and angular...Ch. 16.7 - Determine the angular velocity and angular...Ch. 16.7 - Determine the angular acceleration of link AB and...Ch. 16.7 - Determine the angular acceleration of link CD if...Ch. 16.7 - Determine the velocity and acceleration of point A...Ch. 16.7 - Determine the velocity and acceleration of point B...Ch. 16.7 - If it is pulled with a constant velocity v,...Ch. 16.7 - If it does not slip at A, determine the...Ch. 16.7 - If it does not slip at A, determine the...Ch. 16.7 - As cord CF unwinds from the inner rim of the...Ch. 16.7 - Determine the velocity and acceleration of point B...Ch. 16.7 - Determine the angular velocity and angular...Ch. 16.7 - If link DE has the angular motion shown, determine...Ch. 16.7 - If member AB has the angular motion shown,...Ch. 16.7 - If member AB has the angular motion shown,...Ch. 16.7 - Determine the acceleration of points A and B on...Ch. 16.7 - At a given instant, A has a velocity of vA = 4...Ch. 16.7 - Determine the angular acceleration of rod AB at...Ch. 16.8 - Determine the acceleration of A at the instant...Ch. 16.8 - If at the same instant the disk has the angular...Ch. 16.8 - At the same instant, the boom is extending with a...Ch. 16.8 - Prob. 131PCh. 16.8 - Prob. 132PCh. 16.8 - Determine the velocity and acceleration of a water...Ch. 16.8 - At the instant shown, the cord is pulled down...Ch. 16.8 - Prob. 135PCh. 16.8 - Determine the velocity and acceleration of point C...Ch. 16.8 - Prob. 137PCh. 16.8 - Determine the magnitudes of the velocity and...Ch. 16.8 - If link AD is rotating at a constant rate of AD =...Ch. 16.8 - Determine the angular velocity and angular...Ch. 16.8 - If rod AB has an angular velocity of 2 rad/s and...Ch. 16.8 - Prob. 142PCh. 16.8 - If the gears center O moves with the velocity and...Ch. 16.8 - Prob. 144PCh. 16.8 - Prob. 145PCh. 16.8 - Also at this instant the car mounted at the end of...Ch. 16.8 - If the slider block C is fixed to the disk that...Ch. 16.8 - Determine the velocity and acceleration of car A...Ch. 16.8 - Determine the velocity and acceleration of car B...Ch. 16.8 - Link AB has a pin at B which is confined to move...Ch. 16.8 - Prob. 151PCh. 16.8 - The star wheel A makes one sixth of a revolution...Ch. 16.8 - If the tires do not slip on the pavement,...Ch. 16.8 - Determine the velocity and deceleration of the...Ch. 16.8 - Determine the speed of block B when it has risen s...Ch. 16.8 - At the instant shown, it has an acceleration of...Ch. 16.8 - If bar AB has an angular velocity AB = 6 rad/s,...Ch. 16.8 - If the cable does not slip on the pulley's...Ch. 16.8 - Determine the acceleration of the pin at C and the...Ch. 16.8 - If it does not slip at A, determine the...Ch. 16.8 - Determine the velocity and acceleration of the...
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- 1. The rotating steel shaft is simply supported by bearings at points of B and C, and is driven by a spur gear at D, which has a 6-in pitch diameter. The force F from the drive gear acts at a pressure angle of 20°. The shaft transmits a torque to point A of TA =3000 lbĘ in. The shaft is machined from steel with Sy=60kpsi and Sut=80 kpsi. (1) Draw a shear force diagram and a bending moment diagram by F. According to your analysis, where is the point of interest to evaluate the safety factor among A, B, C, and D? Describe the reason. (Hint: To find F, the torque Tд is generated by the tangential force of F (i.e. Ftangential-Fcos20°) When n=2.5, K=1.8, and K₁ =1.3, determine the diameter of the shaft based on (2) static analysis using DE theory (note that fatigue stress concentration factors need to be used for this question because the loading condition is fatigue) and (3) a fatigue analysis using modified Goodman. Note) A standard diameter is not required for the questions. 10 in Darrow_forward3 N2=28 P(diametral pitch)=8 for all gears Coupled to 25 hp motor N3=34 Full depth spur gears with pressure angle=20° N₂=2000 rpm (1) Compute the circular pitch, the center-to-center distance, and base circle radii. (2) Draw the free body diagram of gear 3 and show all the forces and the torque. (3) In mounting gears, the center-to-center distance was reduced by 0.1 inch. Calculate the new values of center-to-center distance, pressure angle, base circle radii, and pitch circle diameters. (4)What is the new tangential and radial forces for gear 3? (5) Under the new center to center distance, is the contact ratio (mc) increasing or decreasing?arrow_forward2. A flat belt drive consists of two 4-ft diameter cast-iron pulleys spaced 16 ft apart. A power of 60 hp is transmitted by a pulley whose speed is 380 rev/min. Use a service factor (Ks) pf 1.1 and a design factor 1.0. The width of the polyamide A-3 belt is 6 in. Use CD=1. Answer the following questions. (1) What is the total length of the belt according to the given geometry? (2) Find the centrifugal force (Fc) applied to the belt. (3) What is the transmitted torque through the pulley system given 60hp? (4) Using the allowable tension, find the force (F₁) on the tight side. What is the tension at the loose side (F2) and the initial tension (F.)? (5) Using the forces, estimate the developed friction coefficient (f) (6) Based on the forces and the given rotational speed, rate the pulley set. In other words, what is the horse power that can be transmitted by the pulley system? (7) To reduce the applied tension on the tight side, the friction coefficient is increased to 0.75. Find out the…arrow_forward
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