Fundamental States,
Non-classical States.
Solid,
Liquid,
Gas and
Plasma.
Constant speed means the speed does not change at all for each second of the motion. Our <em>example</em> of driving a car on cruise control illustrates constant speed.
<span>Pollination is when the male gamete or pollen reaches the female flower through different modes...wind,air,animals,...
Fertilization </span><span>is when the male gamete "join" with the female gamete to become an embryo.
I hope I helped.:) </span>
Answer:
The work done by friction was ![-4.5\times10^{5}\ J](https://tex.z-dn.net/?f=-4.5%5Ctimes10%5E%7B5%7D%5C%20J)
Explanation:
Given that,
Mass of car = 1000 kg
Initial speed of car =108 km/h =30 m/s
When the car is stop by brakes.
Then, final speed of car will be zero.
We need to calculate the work done by friction
Using formula of work done
![W=\Delta KE](https://tex.z-dn.net/?f=W%3D%5CDelta%20KE)
![W=K.E_{f}-K.E_{i}](https://tex.z-dn.net/?f=W%3DK.E_%7Bf%7D-K.E_%7Bi%7D)
![W=\dfrac{1}{2}mv_{f}^2-\dfrac{1}{2}mv_{f}^2](https://tex.z-dn.net/?f=W%3D%5Cdfrac%7B1%7D%7B2%7Dmv_%7Bf%7D%5E2-%5Cdfrac%7B1%7D%7B2%7Dmv_%7Bf%7D%5E2)
Put the value of m and v
![W=0-\dfrac{1}{2}\times1000\times(30)^2](https://tex.z-dn.net/?f=W%3D0-%5Cdfrac%7B1%7D%7B2%7D%5Ctimes1000%5Ctimes%2830%29%5E2)
![W=-450000 \ J](https://tex.z-dn.net/?f=W%3D-450000%0A%5C%20J)
![W=-4.5\times10^{5}\ J](https://tex.z-dn.net/?f=W%3D-4.5%5Ctimes10%5E%7B5%7D%5C%20J)
Hence, The work done by friction was ![-4.5\times10^{5}\ J](https://tex.z-dn.net/?f=-4.5%5Ctimes10%5E%7B5%7D%5C%20J)