Explanation:
Average acceleration is change in velocity over time.
a = Δv / Δt
a = (22.0 m/s − (-25.0 m/s)) / 0.00350 s
a = 13,400 m/s²
Answer:
Explanation:
Given
mass of Flywheel ![m_1=1440 kg](https://tex.z-dn.net/?f=m_1%3D1440%20kg)
mass of bus ![m_b=10200 kg](https://tex.z-dn.net/?f=m_b%3D10200%20kg)
radius of Flywheel ![r=0.63 m](https://tex.z-dn.net/?f=r%3D0.63%20m)
final speed of bus ![v=21 m/s](https://tex.z-dn.net/?f=v%3D21%20m%2Fs)
Conserving Energy i.e.
0.9(Rotational Energy of Flywheel)= change in Kinetic Energy of bus
Let
be the angular velocity of Flywheel
![0.9\cdot \frac{I\omega ^2}{2}=\frac{m_bv^2}{2}](https://tex.z-dn.net/?f=0.9%5Ccdot%20%5Cfrac%7BI%5Comega%20%5E2%7D%7B2%7D%3D%5Cfrac%7Bm_bv%5E2%7D%7B2%7D)
![I=moment\ of\ Inertia =mr^2=1440\cdot 0.63^2=571.536 kg-m^2](https://tex.z-dn.net/?f=I%3Dmoment%5C%20of%5C%20Inertia%20%3Dmr%5E2%3D1440%5Ccdot%200.63%5E2%3D571.536%20kg-m%5E2)
![0.9\cdot \frac{571.536\cdot \omega ^2}{2}=\frac{10200\cdot 21^2}{2}](https://tex.z-dn.net/?f=0.9%5Ccdot%20%5Cfrac%7B571.536%5Ccdot%20%5Comega%20%5E2%7D%7B2%7D%3D%5Cfrac%7B10200%5Ccdot%2021%5E2%7D%7B2%7D)
![\omega ^2=21^2\times \frac{10200}{0.9\times 571.536}](https://tex.z-dn.net/?f=%5Comega%20%5E2%3D21%5E2%5Ctimes%20%5Cfrac%7B10200%7D%7B0.9%5Ctimes%20571.536%7D)
![\omega =21\times 4.45=93.51 rad/s](https://tex.z-dn.net/?f=%5Comega%20%3D21%5Ctimes%204.45%3D93.51%20rad%2Fs)
Calculate its average speed in meters per second
Answer:
5.77 m/s
Explanation:
Speed= Distance/Time
Distance= 40+ half of 40= 40+20= 60 m
Time= 8.8+1.6=10.4 s
Average speed= 60/10.4=5.769230769 m/s
Approximately, the average speed is 5.77 m/s
Power is defined by the rate of work done by the object. Statement D represents the correct definition of Power.
<h3>What is Power?</h3>
Power can be defined as the transfer of energy from one place to another place. The rate at which this energy is transferred is called power.
In other words, the rate at which the work is done by an object is called its power. The mathematical representation of power is given as,
![P = \dfrac {\Delta W}{\Delta t}](https://tex.z-dn.net/?f=P%20%3D%20%5Cdfrac%20%7B%5CDelta%20W%7D%7B%5CDelta%20t%7D)
Here, P is the power,
is the change in energy or work done and
change in time.
The Power can be written in SI units as Watt or J/s.
Hence we can conclude that the power is the rate at which work is accomplished. Statement D is the correct representation of Power.
To know more about power, follow the link given below.
brainly.com/question/1618040.