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Vanya Saxena Grade: Upto college level
        

A particle is fired vertically upward with a speed of 15km/s. With what speed will it in interstellar space. Assume only earth's gravitational field.

7 years ago

Answers : (1)

Pratham Ashish
17 Points
										

hi,


 to be free from earth,s field & enter in interstellar space one must have a minimum energy corresponding to the escape velocity.


escape velocity of earth = 11.2 km/s  = 11.2  X 103 m / s


      corresponding  K.E. = 1/2 m (11.2  X 103)^2


let the remaining speed in  interstellar space is v km/sec


  remaining K.E.


                     1/2 m (vx 103)^2 =  1/2 m ( 15 X 103 ) ^2 - 1/2 m ( 11.2 x 103 ) ^2


                              v^2 =  15 ^2 - 11.2 ^2


                                     = 99.56


                               v = √99.56 km/ sec


 


 


 


 

7 years ago
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