Answer:
a) 
, b) 
The real force has the opposite direction.
Explanation:
a) Let assume that train moves on the horizontal ground. An equation for the distance travelled by the train is modelled after the Principle of Energy Conservation and Work-Energy Theorem:
![d = \frac{(51000\,kg)\cdot [(90\,\frac{km}{h} )\cdot (\frac{1000\,m}{1\,km} )\cdot (\frac{1\,h}{3600\,s} )]^{2}}{2\cdot (82000\,N)}](https://tex.z-dn.net/?f=d%20%3D%20%5Cfrac%7B%2851000%5C%2Ckg%29%5Ccdot%20%5B%2890%5C%2C%5Cfrac%7Bkm%7D%7Bh%7D%20%29%5Ccdot%20%28%5Cfrac%7B1000%5C%2Cm%7D%7B1%5C%2Ckm%7D%20%29%5Ccdot%20%28%5Cfrac%7B1%5C%2Ch%7D%7B3600%5C%2Cs%7D%20%29%5D%5E%7B2%7D%7D%7B2%5Ccdot%20%2882000%5C%2CN%29%7D)
b) The acceleration experimented by both trains are:
![a = -\frac{[(90\,\frac{km}{h} )\cdot (\frac{1000\,m}{1\,km} )\cdot (\frac{1\,h}{3600\,s})]^{2}}{2\cdot (194.360\,m)}](https://tex.z-dn.net/?f=a%20%3D%20-%5Cfrac%7B%5B%2890%5C%2C%5Cfrac%7Bkm%7D%7Bh%7D%20%29%5Ccdot%20%28%5Cfrac%7B1000%5C%2Cm%7D%7B1%5C%2Ckm%7D%20%29%5Ccdot%20%28%5Cfrac%7B1%5C%2Ch%7D%7B3600%5C%2Cs%7D%29%5D%5E%7B2%7D%7D%7B2%5Ccdot%20%28194.360%5C%2Cm%29%7D)
The coupling force in the car A can derived of the following equation of equilibrium:
The coupling force between cars is:
The real force has the opposite direction.
Answer:
8 mm
Explanation:
Given:
Diameter, D = 800 mm
Pressure, P = 2 N/mm²
Permissible tensile stress, σ = 100 N/mm²
Now,
for the pipes, we have the relation as:
where, t is the thickness
on substituting the respective values, we get
or
t = 8 mm
Hence, the minimum thickness of pipe is 8 mm
Answer:
Switches control the flow of electricity in a circuit.
Answer:
The result might require 9 bits to store
