Asteroid Speed: Calculating with Kinetic Energy

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SUMMARY

The discussion centers on calculating the speed of a 4.50 x 104 kg asteroid with a kinetic energy of 6.20 x 1012 J. The speed is determined using the formula derived from kinetic energy, resulting in a speed of 1.41 x 107 m/s. The participant questions the relevance of gravitational force in this context, clarifying that gravity does not affect the kinetic energy calculation in space.

PREREQUISITES
  • Understanding of kinetic energy formula: KineticEnergy = 0.5 * mass * velocity2
  • Basic knowledge of physics concepts such as mass, velocity, and energy
  • Familiarity with unit conversions in physics
  • Ability to manipulate algebraic equations
NEXT STEPS
  • Study the derivation of the kinetic energy formula in detail
  • Learn about the implications of gravitational forces in different environments
  • Explore the relationship between mass, velocity, and energy in astrophysics
  • Investigate the effects of velocity on kinetic energy in various celestial bodies
USEFUL FOR

Students studying physics, particularly those focusing on mechanics and energy, as well as educators looking for practical examples of kinetic energy calculations in space contexts.

ahrog
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Homework Statement


A 4.50 x 10^4 kg asteroid has 6.20 x 10^12 J of kinetic energy. What is the speed of that asteroid?


Homework Equations


W=Fd
P=W/T
P=Fv


The Attempt at a Solution


V=p/f
V=(6.2 x 10^12)/((4.50 x 10^4 kg)(9.8)
V=1.41 x 10^7 m/s

I am wondering about the gravity part though. Normally, for weight it is on earth, so 9.8 works. But if the asteroid is in space, then can I still use 9.8?
 
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KineticEnergy = 0.5 * mass * velocity * velocity

no gravity involved
 

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