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Kinematics
Kinematics is the study of how a body moves. This includes linear motion, angular motion, and rotational motion.
3,459 Questions
What force transforms kinetic energy into heat energy?
Typically the force here is friction. As the object moves through some medium friction is generated between the particles of the object and the particles of the medium, converting kinetic energy into thermal energy.
In metric units, the prefix 'm' means milli-, which is 1/1000th of a base unit. The prefix 'k' means kilo-, which is 1000 base units. So in 1 millipascal, there are 1/1000th of 1/1000th of a unit, or 1/1 millionth of a kilopascal.
How is deceleration represented on a velocity per time graph?
It is radial the velocity in a direction towards or away from a fixed point of reference (the origin) at a given time. The velocity time graph takes no account of motion in a direction across the radial direction.
What happens to the potential energy as the kinetic of an object increase?
As the kinetic energy of an object increases, its potential energy decreases. This is because energy is transformed from potential to kinetic as an object gains speed or movement. The total mechanical energy of the object (the sum of kinetic and potential energy) remains constant if no external forces are acting on the object.
100 mph is equal to 160.9344 km 100 mi*
1.609344 km
1 mi
=
160.9344 km
How can doing work on an object increase it's kinetic energy?
I lift a book from the floor and place it on my desk.
The amount of work I do on the book is the amount by which
its gravitational potential energy has increased . . .
M G H
where 'M' = mass of the book, 'G' = acceleration of gravity, 'H' = height of the table above the floor.
By the way, when I increased the energy of the book, I also increased its mass. The change in mass is
dM = dE / c2
At what speed does a 1.00 kg mass have a kinetic energy of 1.00 joules?
***Answer 1***
Remember, KE= (1/2)m(v^2),
1 eV=1.6*10^-19 J
-you need to convert, since 1J= 1N*m
m of an electron is 9.1*10^-31 kg
m of a proton is 1.67*10^-27 kg
Good luck!
***Answer 2***
Answer 1 only works for non-relativistic speeds, also when you are dealing with Nuclear Physics you DO NOT want to convert out of eV.
--------------------------------------------------------
E(total) = Energy Kinetic +Energy rest
But in Nuclear Physics E(total) is actually;
E^2 = (pc)^2 + (mc^2)^2
E(total) = E(kinetic) + E(rest)
=> 1.00keV = (pc)^2
from there you should be able to finish it.
That all depends on the altitude the mach speed is occurring at. Mach 1 is defined as the speed of sound which is a function of fluid density.
In air at sea level and normal temperature, 0.85 mach = ~647 mph
0.85mach ~.(0.85*330)mph
Acceleration is change of speed per unit of time Our car's change of speed is 60-0 = 60 mph Aceeleration is 60*3600/5.4 miles/hour squared = 40000 miles/hour squared Alternatively: 60 mph = 88 feet/sec Change of speed = 88-0 feet/sec Acceleration = 88/5.4 = 16.30 ft/sec sq.
The potential energy decreases as the body falls while the kinetic energy increases.
P.E.=mass x gravity x height
The shorter the height the less potential energy there is
K.E.= 1/2 x mass x velocity^2
The velocity increases as the body falls and the bigger the velocity the more Kinetic Energy produced
What are the good and bad points about friction?
Well, friction can be good, and nuisance in many ways. Like, it can be good when it produces heat when you need it, or if you rub your hands together to keep warm in the winter. It can be real annoying if it does things you don't want it to do. Like, creating heat when you need air conditioning, or pulling stuff the opposite way, when you pull it where ever.
Mach 0.925 refers to an aircraft's speed as a multiple of the speed of sound. At this speed, the aircraft is traveling at 925 miles per hour, which is approximately 1.2 times the speed of sound in air.
80 mph.
Very few 'ships' can go that fast, just a few speedboats.
After falling 6 meters, potential energy corresponding to those 6 meters will be converted to kinetic energy. The potential energy (for the 6 meters) is mgh = (5 kg)(9.82 m/s2)(6 m) = 294.6 J, so that is also the kinetic energy, since potential energy has been converted to kinetic energy.
After falling 6 meters, potential energy corresponding to those 6 meters will be converted to kinetic energy. The potential energy (for the 6 meters) is mgh = (5 kg)(9.82 m/s2)(6 m) = 294.6 J, so that is also the kinetic energy, since potential energy has been converted to kinetic energy.
After falling 6 meters, potential energy corresponding to those 6 meters will be converted to kinetic energy. The potential energy (for the 6 meters) is mgh = (5 kg)(9.82 m/s2)(6 m) = 294.6 J, so that is also the kinetic energy, since potential energy has been converted to kinetic energy.
After falling 6 meters, potential energy corresponding to those 6 meters will be converted to kinetic energy. The potential energy (for the 6 meters) is mgh = (5 kg)(9.82 m/s2)(6 m) = 294.6 J, so that is also the kinetic energy, since potential energy has been converted to kinetic energy.
What settings describe a displacement versus time graph?
Constant velocity
Zero acceleration and/or Moving object
Maximal strength is when your stamina improves in your muscle's.
One knot is how many miles per minute?
One knot is equal to one 'nautical' mile per hour. (A British nautical mile is equal to 6,080 feet, an International nautical mile is 1,852 meters.) It is also 1.151 miles per hour.
