Q1) A band and block brake having 14 blocks each subtending and angle of 15° at the center is applied to a drum of 1.12 m effective diameter. The drum and the flywheel mounted on the same shaft have a mass of 1600 Kg and combined radius of gyration of 800 mm. The two ends of the band are attached to pins on opposite sides of the brake lever at a distance of 30 mm and 120 mm from the fulcrum. If a force of 500 N be applied at a distance of 700 mm from the fulcrum f the lever, determine: 1) The maximum braking torque. 2) The angular retardation of the drum. 3) The minimum time taken and the revolutions made by the drum to come to rest from the rated speed of 450 rpm, µ=0.28 4) For the above kind of the braking system, show that 1+ u tan 0 1-u tan 0 T, T, Where: T: Tension in the tight side T: Tension in the slack side

Q1) A band and block brake having 14 blocks each subtending and angle of 15° at the center is applied to a drum of 1.12 m effective diameter. The drum and the flywheel mounted on the same shaft have a mass of 1600 Kg and combined radius of gyration of 800 mm. The two ends of the band are attached to pins on opposite sides of the brake lever at a distance of 30 mm and 120 mm from the fulcrum. If a force of 500 N be applied at a distance of 700 mm from the fulcrum f the lever, determine: 1) The maximum braking torque. 2) The angular retardation of the drum. 3) The minimum time taken and the revolutions made by the drum to come to rest from the rated speed of 450 rpm, µ=0.28 4) For the above kind of the braking system, show that 1+ u tan 0 1-u tan 0 T, T, Where: T: Tension in the tight side T: Tension in the slack side

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: The winding drum of mass 300kg has an effective diameter of 950 mm and radius of gyration of 650 mm.…

Q: Because of the way in which the mass is distributed, wheel A has a radius of gyration of 0.65 m and…

A: For each wheels A and BRadius of the wheel A and B is RA= RB=1m Given mass of Wheel A and B…

Q: The mass of flywheel of an engine is getres. It is found from the turning moment diagre . If the…

Q: A car moving on a level road at a speed of 60 km/hr has wheel base 2.76 metres, distance of C.G.…

A: Given data as per the question speed=60 kmhr=1667 mswheel base (l)=2.76 mdistance of CG from…

Q: An inextensible cord with negligible weight is wrapped around a wheel to support a box of mass m = 2…

Q: The equation of the turning moment for the engine and the equation of the moment required by a…

A: Step 1:Maximum Flywheel Speed:ω = (2 * pi * N) / 60 = (2 * pi * 200) / 60 = 20.94 radians/second…

Q: 40-kg cylinder is hung from the gear system shown. Gear s a mass of 8 kg and a radius of gyration…

A: Given,

Q: A shaft rotating at 120 r.p.m is supported in bearing A and B, 1.8 m apart, A being at the left-…

A: Note: Since you have posted a question with multiple subparts, we will solve the first subpart for…

Q: A 250 mm radius brake drum is shown in Figure 3. The total mass moment of inertia of the brake drum…

A: Given, Radius of the wheel (R)=250mm Mass moment of inertia of the wheel (I)= 20kgm2 Coefficient of…

Q: In an epicyclic gear of the sun and planet type, the p.c.d of the internally toothed ring is to be…

A: given pitch circle diameter of internally toothed ring dr = 220 mm module m= 4 mm the spider…

Q: Group 18, 19, 20, 21, 22 Mass (g) Eccentric length r (mm) A 18 36 39 25 49 34 D. 20 36 6.…

A: Given Data: Ma=18g , Mb=39g, M at c =49 and Md=20 Eccentric Length of A,B,C and D is 36,25,34 and 36…

Q: A student on SAE formula 1 team creates a prototype wheel cover, consisting of a thin ring, five…

A: The mass of each plate is .The mass of the outside ring is .The thickness of the ring is…

Q: If the coefficients of static and kinetic friction between the wheel and the plane are u s determine…

A: Write the given values along with the suitable variables.

Q: The electric motor shown below has a power rating of 18 hp and operates at 3080 RPM. It powers a…

Q: The torque provided by an engine is given by T(0) 12000+2500sin (20) N.m, where is the angle turned…

Q: The flywheel of a small punch rotates at 300 rpm. It is known that 1800 ft Ib of work must be done…

A: Given Data: The initial speed of the flywheel is, N1=300 rpm. The work done to punch a hole is,…

Q: Q3 / A multi – plate clutch is to transmit 12 kW at 1500 r.p.m. The inner and outer radii for the…

A: P=12kw N=1500 rpm r0=100 mm ,ri=50 mm P=1kN Since P=2πNT60T=P×602πNT=12×602×π×1500T=76.394 N-m or…

Q: A shaft turning at a uniform speed carries two uniform discs A and B of masses 10kg and 8kg…

A: A moment is a movement of the body when a body is rotating on an axis. The moment is also known as…

Q: Q10:- An epicyclic train of wheel is arranged as shown in the Fig. below. How many revolutions does…

Q: 10. The flywheel of an engine has a mass of 80 kg and a radius of gyration of 220 mm. If the engine…

Q: cular solid disc of uniform thickness 25 mm, us 225 mm and mass 25 kg, is used as flywhee rotates at…

Q: A shaft carries four masses A, B, C and D of magnitude 10 kg, 20 kg, 15 kg and 25 kg respectively…

Q: Two gears with fixed pins at their (geometric, mass) centers (C₁, C₂) are in mesh as shown. The gear…

Q: Suppose a 30 lb truck wheel 18 in. in diameter has a radius of gyration of 4 in. and the 6120 lb…

A: Given: The mass of the truck wheel is mw=30 lb132.2 ft/s21 ft12 in=0.07764. The diameter of the…

Q: 20ele. The centre e nir oj mass of the the rails Calculare the limmicine

Q: 2200 he centre of ani the

Q: The two 1-kg gears A and B are attached to the ends of a 3-kg slender bar. The gears roll within the…

Q: If a torque of M= 300 lb ft is supplied to the rear roller A, determine the speed of the drum roller…

A: This question is based on the concept of net torque, angular velocity and linear velocity

Q: A shaft carries four masses A, B, C and D are to be completely balanced and revolving at radii 40…

Concept explainers

Clutches, Brakes, Couplings, and Flywheels

The clutch is described as a machine element used to connect or disconnect two shafts together to transmit torque or power. The clutch works on the principles of friction. The clutch is commonly used in automobiles to transfer power from the driving shaft to the driven shaft.

Question

Q1) A band and block brake having 14 blocks each subtending and angle of 15° at the center
is applied to a drum of 1.12 m effective diameter. The drum and the flywheel mounted on
the same shaft have a mass of 1600 Kg and combined radius of gyration of 800 mm. The
two ends of the band are attached to pins on opposite sides of the brake lever at a distance
of 30 mm and 120 mm from the fulcrum. If a force of 500 N be applied at a distance of
700 mm from the fulcrum f the lever, determine:
1) The maximum braking torque.
2) The angular retardation of the drum.
3) The minimum time taken and the revolutions made by the drum to come to rest
from the rated speed of 450 rpm, u=0.28
4) For the above kind of the braking system, show that
T,
1+ µ tan 0
T.
1- u tan 0
Where:
: Tension in the tight side
T: Tension in the slack side
u : Coefficient of friction
n : Number of brake blocks
0: subtending angle for each brake block

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Clutches, Brakes, Couplings and Flywheels

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A shaft with 3 meters span between two bearings carries three masses of 10 kg, 20 kg and 15 acting at the extremities of the arms 45 mm, 60 mm and 50 mm long respectively. The planes in which these masses rotate are 1.2 m, 2.4 m and 3 m respectively from the left end bearing supporting the shaft. The angle between the arms is 60°. The speed of rotation of the shaft ist 50 r.p.m. If the masses are balanced by two counter-masses rotating with the shaft acting at radii of 0.03 m and placed at 0.2 m from each bearing centers, estimate the magnitude of the two balance masses and their orientation with respect to the X-axis, i.e., mass,of 10 kg. Q2) A multi-ploto
The moment of inertia for an extended body is I = [r² dm. Prove that for a circular disc of mass M and radius R the moment of inertia, about an axis through its centre, is I = MR². A 80-kg man stands still on the rim of an initially stationary circular carousel of radius 3 m and mass 200 kg. The man begins to walk at 1 ms-1 (with respect to the ground) along the rim. What is his angular velocity, w? What is his angular momentum? What is the angular velocity of the carousel? How fast is the man walking with respect to the carousel?
A 3 cylinder single acting engine has its cranks set equally at 120° and it runs at 600 rpm. The Torque crank angle diagram for each cylinder is a triangle for the power with maximum torque 80 N-m at 60° after dead centre of the corresponding crank. The torque on the return stroke is sensibly zero. Determine the (a) Power developed (b) K if the flywheel used has a mass of 10 Kg. and radius of gyration is 8 cm (c) Coefficient of luctuation of energy (d) Maximum angle of the flywheel CYLI CYL2 CYL3 80 MMT 60 120 I 8O 240 300 360
A wheel is attached by a cable to a block The wheel has a radius of 2ft and weighs 300lbs, the block weights 20lbs. If the radius of gyration about the point of rotation of the disk is 1.5ft, how many revolutions will it take for the wheel to come to a stop assuming it was moving at 10 rad/s CW. Assume the block is on the left side of the wheel and thus causes a CCW moment.
A pair of rods and disc form a triangle with a spring (a spring connects A to C). The spring has a spring constant of 20 N/m and an unstretched length of 1.5m. each rod has a length of 3m and a mass of 10kg. The disk has a mass of 5kg, a radius of .5 and rolls without slipping. The system starts with an angle between the spring and rods of 60 degrees, determine the angular velocity of the rods after it has dropped to a 30 degree angle.
Q8:- The torque exerted on the crank of two stroke engine is given by the equation ( T= 14224.5 + 2256.3 sin 20 – 1864 cos 20 ) N.m where 0 is the crank angle of the displacement from the i.d.c. Assuming the resisting torque to be uniform, determine:- (a) the power of the engine when the speed is 150 rpm, (b) the mass moment of inertia of the flywheel if the speed variation is not to exceed ± 0.5% of the mean speed and (c) the angular acceleration of the flywheel when the crank has turned 30° from the i.d.c.
4. In order to determine the mass moment of inertia of a 4-foot diameter flywheel, the flywheel is tested\twice with different deadweight. In the first test a weight of 20 lb is attached by cord and observed to fall 10 ft in 4.6 seconds. In the second test a weight of 40 lb falls 10 ft in 3.1 seconds. Assuming that the torque due to bearing friction is constant, determine mass moment of inertia of the flywheel. Your solution must include W supporting FBDS.
I posted this question before but I was given an answer for mass in terms of weight. I was given an answer for inertia in terms of weight when it should be in mass.
Solve correctly! Use image down below and pay attention to the numbers that it’s using UNITS SHOULD BE (m/sec) use the correct units!!!
Parvinbhai