Answer:
3.91407 rad/s
11.742 rad/s
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement = 79 cm
g = Acceleration due to gravity = 9.81 m/s² = a
![s=ut+\frac{1}{2}at^2\\\Rightarrow 0.79=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{0.79\times 2}{9.81}}\\\Rightarrow t=0.40132\ s](https://tex.z-dn.net/?f=s%3Dut%2B%5Cfrac%7B1%7D%7B2%7Dat%5E2%5C%5C%5CRightarrow%200.79%3D0t%2B%5Cfrac%7B1%7D%7B2%7D%5Ctimes%209.81%5Ctimes%20t%5E2%5C%5C%5CRightarrow%20t%3D%5Csqrt%7B%5Cfrac%7B0.79%5Ctimes%202%7D%7B9.81%7D%7D%5C%5C%5CRightarrow%20t%3D0.40132%5C%20s)
If the bread is rotating 1 side of a rotation would be 0.25 as there are 4 sides
Angular speed is given by
![\omega_{min}=\dfrac{\Delta\theta}{\Delta t}\\\Rightarrow \omega_{min}=\dfrac{0.25\times 2\pi}{0.40132}\\\Rightarrow \omega_{min}=3.91407\ rad/s](https://tex.z-dn.net/?f=%5Comega_%7Bmin%7D%3D%5Cdfrac%7B%5CDelta%5Ctheta%7D%7B%5CDelta%20t%7D%5C%5C%5CRightarrow%20%5Comega_%7Bmin%7D%3D%5Cdfrac%7B0.25%5Ctimes%202%5Cpi%7D%7B0.40132%7D%5C%5C%5CRightarrow%20%5Comega_%7Bmin%7D%3D3.91407%5C%20rad%2Fs)
The minimum angular speed is 3.91407 rad/s
![\omega_{max}=\dfrac{\Delta\theta}{\Delta t}\\\Rightarrow \omega_{max}=\dfrac{0.75\times 2\pi}{0.40132}\\\Rightarrow \omega_{max}=11.742\ rad/s](https://tex.z-dn.net/?f=%5Comega_%7Bmax%7D%3D%5Cdfrac%7B%5CDelta%5Ctheta%7D%7B%5CDelta%20t%7D%5C%5C%5CRightarrow%20%5Comega_%7Bmax%7D%3D%5Cdfrac%7B0.75%5Ctimes%202%5Cpi%7D%7B0.40132%7D%5C%5C%5CRightarrow%20%5Comega_%7Bmax%7D%3D11.742%5C%20rad%2Fs)
The maximum angular speed is 11.742 rad/s
Answer:
40 gm
Explanation:
size one is 1/3 of size 3
so the mass is also 1/3
1/3 * 120 gm = 40 gm
Answer:
positive, positive
You throw a rock upward. The rock is moving upward, but it is slowing down. If we define the ground as the origin, the position of the rock is positive and the velocity of the rock is positive
Explanation:
Given that the ground is defined as the origin.
The position of the rock is positive since the rock is thrown upward, the position also increases with time until it reaches the maximum height. Also, since the rock is thrown upward with the ground as the origin, the velocity of the rock is positive but the velocity reduces with time (change in height per unit time as the rock moves up is positive)
Answer:
Explanation:
Technician A is incorrect as in series circuit the current is the same for all the resistors and if one bulb fails in the path then the circuit is incomplete and therefore no flow of current.
Technician B is correct as in parallel circuit there are multiple paths for current through which it can pass and malfunctioning of one resistor does not affect the other.