Answer: Resonance
Explanation:
Resonance is a vibration set up in a body (house windows) due to a transfer of energy from another body (loud bass speaker) which is vibrating with a same or nearly equal frequency as that of the first.
Thus, resonance explains that once the natural frequency of the windows happens to be the same as the frequency of the speaker, vibrations occurs.
It illustrates the functioning of different Neural networks
Answer:
a = 1.16 m/s²
Explanation:
In order to find the acceleration of the ball we will use 3rd equation of motion.
2as = Vf² - Vi²
where,
a = acceleration = ?
s = displacement = 21.9 m
Vf = Final Velocity = 7.14 m/s
Vi = Initial Velocity = 0 m/s (Since, ball starts from rest)
Therefore, using the values, we get:
2a(21.9 m) = (7.14 m/s)² - (0 m/s)²
a = (50.97 m²/s²)/(43.8 m)
<u>a = 1.16 m/s²</u>
Answer:
F = 1.6*10⁴ N
Explanation:
Given distance x = 0.15m, mass m = 1200kg, velocity v = 2m/s.
Unknown: force F
Force is given by Newton's law:
(1) ![F = ma](https://tex.z-dn.net/?f=F%20%3D%20ma)
The average force to stop an object from a velocity will be the same force necessary to accelerate an object from rest to the same velocity.
The distance for an object starting from rest for a constant acceleration is given by:
(2) ![x=\frac{1}{2}at^2](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B1%7D%7B2%7Dat%5E2)
The velocity for an object starting from rest for a constant acceleration:
(3) ![v=at](https://tex.z-dn.net/?f=v%3Dat)
Using equation 2 and 3 to eliminate time t:
(4) ![x=\frac{1}{2}a\frac{v^2}{a^2}=\frac{v^2}{2a}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B1%7D%7B2%7Da%5Cfrac%7Bv%5E2%7D%7Ba%5E2%7D%3D%5Cfrac%7Bv%5E2%7D%7B2a%7D)
Solving equation 4 for the acceleration a:
(5) ![a=\frac{v^2}{2x}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7Bv%5E2%7D%7B2x%7D)
Using equation1 to solve for the force F:
(6) ![F=ma=\frac{mv^2}{2x}](https://tex.z-dn.net/?f=F%3Dma%3D%5Cfrac%7Bmv%5E2%7D%7B2x%7D)
When an object moves its length contracts in the direction of motion. The faster it moves the shorter it gets in the direction of motion.
The object in this question moves and then stops moving. So it's length first contracts and then expands to its original length when the motion stops.
The speed doesn't have to be anywhere near the speed of light. When the object moves its length contracts no matter how fast or slow it's moving.