Answer:
h = 3.5 m
Explanation:
First, we will calculate the final speed of the ball when it collides with a seesaw. Using the third equation of motion:
![2gh = v_f^2 - v_i^2\\](https://tex.z-dn.net/?f=2gh%20%3D%20v_f%5E2%20-%20v_i%5E2%5C%5C)
where,
g = acceleration due to gravity = 9.81 m/s²
h = height = 3.5 m
vf = final speed = ?
vi = initial speed = 0 m/s
Therefore,
![(2)(9.81\ m/s^2)(3.5\ m) = v_f^2 - (0\ m/s)^2\\v_f = \sqrt{68.67\ m^2/s^2}\\v_f = 8.3\ m/s](https://tex.z-dn.net/?f=%282%29%289.81%5C%20m%2Fs%5E2%29%283.5%5C%20m%29%20%3D%20v_f%5E2%20-%20%280%5C%20m%2Fs%29%5E2%5C%5Cv_f%20%3D%20%5Csqrt%7B68.67%5C%20m%5E2%2Fs%5E2%7D%5C%5Cv_f%20%3D%208.3%5C%20m%2Fs)
Now, we will apply the law of conservation of momentum:
![m_1v_1 = m_2v_2](https://tex.z-dn.net/?f=m_1v_1%20%3D%20m_2v_2)
where,
m₁ = mass of colliding ball = 3.6 kg
m₂ = mass of ball on the other end = 3.6 kg
v₁ = vf = final velocity of ball while collision = 8.3 m/s
v₂ = vi = initial velocity of other end ball = ?
Therefore,
![(3.6\ kg)(8.3\ m/s)=(3.6\ kg)(v_i)\\v_i = 8.3\ m/s](https://tex.z-dn.net/?f=%283.6%5C%20kg%29%288.3%5C%20m%2Fs%29%3D%283.6%5C%20kg%29%28v_i%29%5C%5Cv_i%20%3D%208.3%5C%20m%2Fs)
Now, we again use the third equation of motion for the upward motion of the ball:
![2gh = v_f^2 - v_i^2\\](https://tex.z-dn.net/?f=2gh%20%3D%20v_f%5E2%20-%20v_i%5E2%5C%5C)
where,
g = acceleration due to gravity = -9.81 m/s² (negative for upward motion)
h = height = ?
vf = final speed = 0 m/s
vi = initial speed = 8.3 m/s
Therefore,
![(2)(9.81\ m/s^2)h = (0\ m/s)^2-(8.3\ m/s)^2\\](https://tex.z-dn.net/?f=%282%29%289.81%5C%20m%2Fs%5E2%29h%20%3D%20%280%5C%20m%2Fs%29%5E2-%288.3%5C%20m%2Fs%29%5E2%5C%5C)
<u>h = 3.5 m</u>
Answer:
The combination of elements most likely to comprise the circuit are resistor, inductor and capacitor
Explanation:
The impedance of an LCR circuit shown as
Z = √R² + (X↓l - X↓c)²
Z = √R² + (2π∨L - 1/2π∨c)²
Variation of Z with respect to υ is shown in the figure.
As υ increases, Z decreases and so the current increases.
At υ = υ↓r
Z is minimum, current is maximum. Beyond
υ = υ↓r
Z increases and so current decreases.
so the combination of circuit elements that is most suitable to comprise
the circuit is R, L and C.
To learn more about these circuits
brainly.com/question/13140756
#SPJ4
False.
As temperature increases the more the electrons begin to vibrate more, as it decreases they vibrate less.
Answer:
the angle of incidence θ is 45.56 º
Explanation:
Given data
strikes the mirror before wall x = 30.7 cm
reflected ray strikes the wall y = 30.1 cm
to find out
the angle of incidence θ
solution
let us consider ray is strike at angle θ so after strike on surface ray strike to wall at angle 90 - θ
we will apply here right angle triangle rule that is
tan( 90 - θ) = y /x
tan( 90 - θ) = 30.1 / 30.7
90 - θ = tan^-1 (30.1/30.7)
90 - θ = 44.4345
θ = 45.56 º
the angle of incidence θ is 45.56 º
Answer:
A. usually 3 cards a year means you have little or no credit I believe