Estimate the velocity achieved when you jump

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SUMMARY

The discussion focuses on estimating the velocity achieved when jumping, utilizing the conservation of energy principle. The key formula discussed is ymax = (v^2 sin^2 θ) / (2g), which relates maximum height to initial velocity. The user calculated potential energy (Pe) and kinetic energy (Ke) using a height of 50 cm, mass of 61235 grams, and gravity of 98.1 cm/s². The final calculation yielded an initial velocity of 1.72e6 cm/s, confirming the application of energy conservation principles in the context of astrophysics.

PREREQUISITES
  • Understanding of conservation of energy principles
  • Familiarity with potential energy (Pe) and kinetic energy (Ke) equations
  • Basic knowledge of gravitational acceleration (g) values
  • Ability to manipulate and solve algebraic equations
NEXT STEPS
  • Study the derivation of the conservation of energy equation in physics
  • Learn about gravitational acceleration variations on different celestial bodies
  • Explore the implications of jumping on low-gravity environments like asteroids
  • Investigate the effects of mass and height on kinetic energy calculations
USEFUL FOR

Students in astrophysics, physics enthusiasts, and anyone interested in the mechanics of jumping and energy conservation in varying gravitational contexts.

leonne
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Homework Statement


estimate the velocity you achieve when you jump straight up hint use the height you reach jumping on Earth to estimate the change in potential energy and then use conservation of energy to estimate you initial kinetic energy

Homework Equations


ymax=(v^2 sin^2 @)/2g

The Attempt at a Solution



Can I just use that formula to solve for velocity or I have to use something else from what the hint is saying.
The main question is about, seeing if you can jump off an asteroid under your own power.
 
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leonne said:

Homework Statement


estimate the velocity you achieve when you jump straight up hint use the height you reach jumping on Earth to estimate the change in potential energy and then use conservation of energy to estimate you initial kinetic energy

Homework Equations


ymax=(v^2 sin^2 @)/2g

The Attempt at a Solution



Can I just use that formula to solve for velocity or I have to use something else from what the hint is saying.
You have the wrong formula. Follow the hint. What is the kinetic energy and potential energy immediately after jumping (h=0, v = vmax)? What is the kinetic energy and potential energy at maximum height? Write out the expression for total energy. Does it change?

AM
 
Hey thxs for the info so this is what i got
Pe= mgh Ke=1/2 Mv^2 height i got 50 cm mass 61235 grams and gravity is 98.1cm/s^2 (This is for astrophysics and some reason we can't use si units)

And using conservation of energy Pei+Kei= Pef +Kef

Pei would be 0 , we are trying to find kei Pef would be 3.00 e8 and Kef would be the same as Pef Then just solve for Kei =9e16 then plug that in the formula to find the initial velocity =1.72e6

Did i do this right?
 

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