Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Figure P18.22 shows a brake with only one shoe, being applied by a 1.5-kN force. (The complete brake would normally have a second shoe in order to balance the forces, but only one shoe is considered here to keep the problem short.) Four seconds after force F is applied, the drum comes to a stop. During this time the drum makes 110 revolutions. Use the short-shoe approximation and an estimated coefficient of friction of 0.35.
(a) Draw the brake shoe and arm assembly as a free body in equilibrium.
(b) Is the brake self-energizing or deenergizing for the direction of drum rotation involved?
(c) What is the magnitude of the torque developed by the brake?
(d) How much work does the brake do in bringing the drum to a stop?
(e) What is the average braking power during the 4-second interval?
(f) How far below the drum center would the arm pivot need to be to make the brake self-locking for f = 0.35?
The magnitude of force P is slowly increased. Does the homogeneous box of mass m slip or tip first? State the value of P which would cause each occur- rence. Neglect any effect of the size of the small feet.
1 one way to study the surface tension effects in a liquidsolid system is to dip a pair of parallel plates into the
during a picnic on a hot summer day all the cold drinks disappeared quickly and the only available drinks were those at
a particle moves along a stright line with an acclereation a 2 v 12 where v is in ms.if s0 v4 ms.when t0 determine the
A heat engine operating on the Carnot cycle has an efficiency of 65%. The waste heat from the cycle is rejected to the atmosphere at 20 deg. C. at a rate of 250 kW. What is the temperature of the heat source driving the engine in deg. C? For the heat..
Describe a data dictionary and list the types of information it contains.
1.tensile tests were done on a steel bar an aluminum bar and a plastic bar. the bars all had a diameter of 0.505
a power generator burns natural gas consisting of 30 ethane 60 methane and the balance nitrogen. the gas undergoes
a 10 lb uniform thin bar bc of length l10 ft is pinned at b to the edge of a 18 lb uniform disk of radius r 3.2 ft.
Design a Network and VPN 1.Design a VPN between offices in Chicago, New York, and Washington D.C. Each site has 200 users.2.Explain how to connect the three LANs.
Both small pipes have the same length and pressure drop. If all flows are turbulent, at ReD near 104 , estimate the diameter of the smaller pipe.
Why are ultraviolet emitting sources avoided?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd