<span>The normal force is the support force exerted upon an object which is in contact with another stable object. For example, if a book is resting upon a surface, then the surface is exerting an upward force upon the book in order to support the weight of the book. The normal force in itseñf comes from the third law of Newton as a reactive force</span>
If the person if slowing down, then this would mean that this would actually be "negative acceleration". Sense this person first did a mile in 10 minutes, and then the next mile that this person did was actually 15 minutes, then this shows you that they actually went a lot slower. And this is why this would be a great example of "negative acceleration".
Answer:
Part(a): The final angular velocity is
Part(b): The ratio of the rotational energies is ,showing the the energy of th system will decrease.
Explanation:
Part(a):
If '' be the moment of inertia of an object and '' be its angular velocity then the angular momentum '' of the object can be written as
If '' and '' be the moment of inertia of the two cylinders and '' and '' be the initial angular velocity of the cylinders and '' and '' be their respective final angular velocity, then from conservation of angular momentum,
Given, . From the above expression
Part(b):
Initial kinetic energy
and Final kinetic energy
Substituting the value of ,
The above expression shows that the ebergy of the system will decrease.
Answer:
All organisms begin their lives as single cells.Overtime,these organisms grow and take on the characteristics of their species...All organisms grow,and different parts of organisms may grow at different rates.Organisims made out of only one cell
may change little during their lives, but they do grow
Explanation:
brainlest me please
Because "velocity" means the speed and direction of the motion.
In circular motion, or motion on any curved path, the direction is constantly changing. So even if the speed isn't changing, the <em>velocity</em> is.