In order to make structures more seismic safe there are various ways by which one can build earthquake resistance structures which are far better than conventional ones.
The pyramidal or triangular shape structures contain less number of sides.A structure containing less number of sides frames greater resistance shape.
A rigid structure is more crumble and is more prone to annihilation.So the structure should be flexible.If we compare a taller building with a shorter one,the tall structure is more flexible.The shorter builds can not withstand the force of earth quakes.
During the construction of buildings,one should introduce the foundational plates .The layered foundational plates help buildings or other structures from destruction as they allow the sliding movement of the earth quake.
Average speed = Distance ÷ Time
Distance = 38 m + 1/2 of 38 m = 38 + 19 = 57 m
Time = 9 + 1.8 = 10.8 s
Average speed = 57/10.8 = 5.277 m/s
Average Velocity = Displacement ÷ Time
Displacement = 19m
Time = 9 + 1.8 = 10.8 s
Average velocity = 1.759 m/s
Answer: ![\sqrt{2}](https://tex.z-dn.net/?f=%5Csqrt%7B2%7D)
The linear momentum
is given by the following equation:
(1)
Where
is the mass and
the velocity.
On the other hand, the kinetic energy
is given by:
(2)
Which is the same as:
![K=\frac{1}{2}m.v^{2}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B1%7D%7B2%7Dm.v%5E%7B2%7D)
Now, if we double the kinetic energy, equation (2) changes to:
(3)
So, if we want to obtain the kinetic energy as shown in (3), the only option that works is increasing momentum by a factor of
or
:
Applying this in (2):
![K=\frac{(\sqrt{2}p)^{2}}{2m}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%28%5Csqrt%7B2%7Dp%29%5E%7B2%7D%7D%7B2m%7D)
![K=\frac{(2p)^{2}}{2m}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%282p%29%5E%7B2%7D%7D%7B2m%7D)
>>>As we can see, this equation is the same as equation (3)
Therefore, the correct answer is B