Last Updated On [03-11-2023]
A body of mass 
is thrown upwards with a velocity 
. It momentarily comes to rest after attaining a height of 
. How much energy is lost due to air friction in J is
A body of mass is thrown upwards with a velocity . It momentarily comes to rest after attaining a height of . How much energy is lost due to air friction in J is
Question ID - 50908 :-
A body of mass is thrown upwards with a velocity . It momentarily comes to rest after attaining a height of . How much energy is lost due to air friction in J is
|
A body of mass |
Initial energy of body 
A part of this energy consumes in doing work against gravitational force and remaining part consumes in doing work against air friction
i.e., 
Next Question :
Ten years ago, the ages of the members of a joint family of 8 people added up to 231 years. Three years later, one member died at the age of 60 years and a child was born during the same year. After another three years, one more member died, again at 60, and a child was born during the same year. The current average of this eight-member joint family is nearest to
(a) 21 yrs. (b) 22 yrs. (c) 23 yrs. (d) 24 yrs.
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