Answer:
w=3.05 rad/s or 29.88rpm
Explanation:
k = coefficient of friction = 0.3900
R = radius of the cylinder = 2.7m
V = linear speed of rotation of the cylinder
w = angular speed = V/R or to rewrite V = w*R
N = normal force to cylinder
N=


These must be balanced (the net force on the people will be 0) so set them equal to each other.





There are 2*pi radians in 1 revolution so:

So you need about 30 RPM to keep people from falling out the bottom
Mars is 141,600,000 miles from the Sun
The mass is 639E21 kg
One day length is 24 hours and 40 minutes
The radius is 2,106 miles
And has 2 moons, Phobos and Deimos
To calculate the change in kinetic energy, you must know the force as a function of position. The work done by the force causes the kinetic energy change
Explanation:
The work-energy theorem states that the change in kinetic enegy of an object is equal to the work done on the object:

where the work done is the integral of the force over the position of the object:

As we see from the formula, the magnitude of the force F(x) can be dependent from the position of the object, therefore in order to solve correctly the integral and find the work done on the object, it is required to know the behaviour of the force as a function of the position, x.
<h2>Answer: Neptune
</h2>
The dwarf planet Pluton, <u>has the most eccentric orbit</u> (more elliptical and elongated) of all the planets, and as a consequence its orbit is "intersected" by the orbit of Neptune.
However, <u>despite this intersection, there is no collision risk between these two bodies</u>, since the orbit of Pluto is located in an orbital plane different from that of the other planets and therefore different from that of Neptune, its nearest neighbor. In addition, the orbit of Pluton is inclined
on the the ecliptic plane (plane where the other planets move around the Sun).
This happens at the boiling temperature of every substance that can vaporize<span>. At the </span>boiling temperature<span>, </span>adding heat energy converts the liquid into a gas WITHOUT RAISING THE TEMPERATURE<span>.The </span>same thing happens when a solid changes into liquid<span>. For </span>instance<span>, </span>ice and water can exist<span> together at the melting </span>temperature<span>.</span>