Gravitational force & escape velocity

  • Thread starter hadeel
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  • #1
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1- F = mk/r^2 ... k is -ve value ...why ?? please in concise way


2- for escape velocity .......
v( inital) = root ( 2gR ).... with proof

thank u
 

Answers and Replies

  • #2
Doc Al
Mentor
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1- F = mk/r^2 ... k is -ve value ...why ?? please in concise way
Gravity is an attractive force, which acts in the -r direction.

2- for escape velocity .......
v( inital) = root ( 2gR ).... with proof
Prove it for yourself using conservation of energy.
 

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