Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
142 views
in Physics by (91.6k points)
closed by
The escape velocity of a body from the surface of earth is the minimum velocity of projection of the body from the surface, which would take the body just beyound the gravitational field of earth. Once the body crosses the gravitational field of earth, it will never return to earth on its own. The body is said to have esacped. If `M` is mass of earth and `R` is radius of earth, then esacpe velocity,
`V_(e) = sqrt((2GM)/(R )) = sqrt(2gR)`. The value of `V_(e)` does not depend upon mass of the body.
Read the above passega and answer the following questions :
(i) What is the escape velocity from the surface of earth for a body of mass `2 kg` and for another body of mass `20 kg`? Is the energy required in the two cases same ?
(ii) What value of life do you learn from this study ?

1 Answer

0 votes
by (91.1k points)
selected by
 
Best answer
(i) As escape velocity does not depend upon mass of the body, therefore, value of escape velocity from the surafce of earth for both the bodies is same `(= 11 km//sec)`.
No, the energy required in the two cases shell not the same. This is because, energy required `= (1)/(2) m V_(E)^(2)`, which is directly proportional to `m`. For body of mass `20 kg`, energy required is `10` times the energy required for body of mass `2 kg`.
(ii) From this study, we learn that everything has a price. You pay the price and get the thing. If you are not able to affored the price of something, you cannot get it. This is so true for anything and everthing in life.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...