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!
Average force of resistance:
A gun weighing 500 kN is utilized to fire a shell weighing 10 kN in a horizontal direction with a velocity of 500 metres/sec. With what initial velocity the gun shall recoil? What shall be the average force of resistance to bring it to rest in a distance of 1.25 metres?
Solution
Considering gravitational acceleration = 10 m/sec2.
Mass of shell = 10 × 103 /10
= 1000 kg
Mass of gun = 500 × 103 /10
= 50 × 103 kg or 50 tonne.
By applying the principle of conservation of momentum,
1 × 500 + 50 × V = 0
∴ V = - 10 metres / sec.
Negative sign of the velocity of gun mentions that the direction of velocity of the gun is opposite to that of the shell. This is for this reason, that motion of gun is called as recoil.
Consider F be the average retarding force causing retardation (- a) of the gun. As final velocity of gun is zero, through equation
V 2 = u 2 + 2 a s
we have
∴ 0 = 102 + 2 a × 1.25
∴ a = - 100 / (1.25 × 2)
= - 40 metres / sec2
∴ Retarding Force, F = m × a
= 50 × 40 = 2000 kN.
Flash Butt Welding-Flashing The phenomenon of flashing is of extreme importance in achieving satisfactory welds. Flashing can begin only after a molten bridge has been formed s
A counter flow heat exchanger is used to cool 2000kg/hr of oil(Cp= 2.5 KJ/Kg K) from 105 o C to 30 o C by the use of water entering at 15 o C. If the overall heat transfer coeff
Provide the various considerations to be taken in designing the cast iron housing for a heavy duty machines?
The problem: - Deaf blind people have a huge problem when crossing the streets. They always need assistance from a sighted person or a trained dog to cross the street. There i
(i) Describe Poisson's Ratio. (ii) A circular rod of 100mm diameter and 500 mm length is subjected to a tensile force of 1000 KN. Calculate the modulus of bulk modulus, rigidity
Bund / dike capacity is typically covered by local codes and regulations, however some general principles for liquid storage compounds are: • The net capacity of a bunded / dik
I have 5000 kg boiler capacity. In flow of 1 m3 gas flow how much steam I can produce
Vernier Calipers: It is used to measure internal as well as outer diameters of an object. There are separate jaws available for inside and outside diameter measurements. It can al
At a fixed point in a strained material the intensities of normal stress on the planes at right angles to each other are 20 N/mm 2 and 10 N/mm 2 . Evaluate the principal stresses
the base of a spring -mass- damper system is subjected to the periodic displacement. determine the response of the mass using the principle of superposition
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