Calculating Velocity of Free-Falling Object from Rest at Different Altitudes

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To calculate the velocity of a 100kg object falling from 50km, the conservation of energy principle is applied, ignoring aerodynamic drag. The gravitational force acting on the object is calculated to be 967.74N, resulting in an acceleration of approximately 9.68 m/s². Using these values, the final velocity just before impact can be determined. The discussion emphasizes the importance of applying physics equations correctly to derive the solution. Ultimately, the focus is on understanding the principles of free fall and energy conservation.
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Homework Statement


A 100kg object is released from rest at an altitude of h=50km. Ignoring aerodynamic drag and wind behaviour, determine the velocity of the object just before it strikes the Earth at sea level, asumming gravity is 9.81 m/s^2 and constant


Homework Equations



F=G(m1m2)/r^2

F=ma

The Attempt at a Solution


F=967.74N
a=9.68m/s2
 
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Hi student1! :smile:
student1 said:
A 100kg object is released from rest at an altitude of h=50km. Ignoring aerodynamic drag and wind behaviour, determine the velocity of the object just before it strikes the Earth at sea level, asumming gravity is 9.81 m/s^2 and constant

Hint: use conservation of energy :wink:
 


thank you very much
 

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