Answer:
![t=5.72\ s](https://tex.z-dn.net/?f=t%3D5.72%5C%20s)
Explanation:
Given:
the displacement as the function of time:
![s=2t^3-3t^2-63t](https://tex.z-dn.net/?f=s%3D2t%5E3-3t%5E2-63t)
here time is in seconds and the displacement in meters.
Now we differentiate this eq. of displacement to get the equation of velocity:
![v=\frac{d}{dt}(s) \\v=6t^2-6t-63](https://tex.z-dn.net/?f=v%3D%5Cfrac%7Bd%7D%7Bdt%7D%28s%29%20%5C%5Cv%3D6t%5E2-6t-63)
According to given the velocity is
at some time:
![99=6t^2-6t-63](https://tex.z-dn.net/?f=99%3D6t%5E2-6t-63)
![6t^2-6t-162=0](https://tex.z-dn.net/?f=6t%5E2-6t-162%3D0)
& is the only time for (t>=0) instances when the particle will have a velocity of
but in the opposite direction.
False, this is because of newton’s law...every action force has an equal and opposite reaction force.
Answer:
D. The frequency is not affected as the volume of sound increases
Explanation:
Volume of the sound is defined by the amplitude of the wave or how loud a sound is whereas Frequency is basically the pitch of the sound and is inversely proportional to the wavelength . Increasing frequency will increase the pitch of the sound without affecting it's volume.
Answer:
The position, speed, direction and acceleration