A projectile fired upward from the Earth's surface will usually slow down, come momentarily to rest, and return to Earth. For a certain initial speed, however it will move upward forever, with its speed gradually decreasing to zero just as its distance from Earth approaches infinity. The initial speed for this case is called escape velocity. You can find the escape velocity v for the Earth or any other planet from which a projectile might be launched using conservation of energy. The projectile of mass m leaves the surface of the body of mass M and radius R with a kinetic energy Ki = mv²/2 and potential energy Ui = -GMm/R. When the projectile reaches infinity, it has zero potential energy and zero kinetic energy since we are seeking the minimum speed for escape. Thus Uf = 0 and Kf = 0. And from conservation of energy,
Ki + Ui = Kf + Uf
mv²/2 -GMm/R = 0
∴ v = √(2GM/R)
This is the expression for escape velocity.
Solar system coalesced out of a swirling cloud of interstellar dust/gas is known as nebula gas theory
According to nebula gas theory, the Sun and all the planets of our Solar System began as a giant cloud of molecular gas and dust called solar nebula. Then, about 4.57 billion years ago, something happened that caused the cloud to collapse.
A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula. The Sun formed in the center, and the planets formed in a thin disk orbiting around it.
Nebular Hypothesis: a widely accepted model. Originally formulated in 1755 by a German Philosopher Immanuel Kan. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. The solar system coalesced out of a swirling cloud of interstellar dust/gas called nebula. Sun born from a nuclear reaction called nebula.
To learn more about Nebula gas theory here
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Answer:
Lawns are extremely costly in many ways, including dollars spent on them, the deadly ... Using lawn equipment also significantly adds to noise pollution. ... to all of the environmental damages, including water pollution, caused by fracking. ... ONE's ambition is to remain unbiased and to provide a good
Explanation:
Answer:
The acceleration of Chevy Corvette is 
.
Explanation:
Given that,
Initial speed of Chevy Corvette Z06, u = 0 (it starts from rest)
Final speed of Chevy Corvette Z06, v = 60 mph
1 mph = 0.44704 m/s
60 mph = 26.82 m/s
Time, t = 3 seconds
We need to find the acceleration of Chevy Corvette. The rate of change of velocity is called acceleration of an object. It is given by :
So, the acceleration of Chevy Corvette is . Hence, this is the required solution.
