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1000 lb trunch the black resting on the incline plan has a mass of 60g. determine maximum and minimum value of P for which the block is in equilibrium. (fs = 0.35)

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Beverley Smith
Beverley SmithLv2
5 Apr 2019
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Related questions

A double-notched specimen with dimensions of h = 10cm, w = 3cm, and a thickness of t = 2mm is subjected to a load of P = 32kN. The material has a Young’s modulus of 180 GPa and Poisson’s ratio of v = 0.42

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  2. b) Does this satisfy the conditions for plane strain? Is the assumption of LEFM valid?

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  3. c) Determine the minimum dimensions and crack length to satisfy the conditions of both plane

strain and LEFM.

the position of the 4 kg collar C on the smooth rod AB is held at r=0.72 m and L=0.3 m , determine the constant angular velocity (Theta) at which the mechanism is rotating about the vertical axis. The spring with k= 219 N/m has an unstretched length of 0.4 m. Neglect the mass of the rod and the size of the collar.

Angular Velocity (Theta) (in rad/s)

Answer

1. Calculate the quantity of heat energy which must be transferred to 2.25 kg of brass to 
raise its temperature from 20 ℃ to 240 ℃ if the specific heat of brass is 394 J.kg-K.


2. Find the change in temperature produced by 10 kJ of heat energy added to 500 g 
copper. Specific heat of copper 0.39 kJ/kg-K.


3. Explain why, for a gas, the specific heat at constant volume has a different value 
from the specific heat at constant pressure.
An ideal gas is contained in a cylinder fitted with a piston. Initially the temperature of the 
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(a) The piston is fixed;
(b) The piston moves and the pressure is constant.
For the gas, 𝑐𝑣 = 676 J/kg-K and 𝑐𝑝 = 925 J/kg-K.

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