A) 50 m
B) 25 m
C) 12.5 m
D) 19.6 m
Correct Answer: C
Solution :
As body is thrown upwards with kinetic energy of 490 J, so at maximum height it converts wholly to potential energy ie, \[{{U}_{\max }}=490\,J\] Let at height h\ it becomes just half. So, \[mgh=\frac{{{U}_{\max }}}{2}\] or \[h=\frac{490}{2\times 2\times 9.8}=12.5\,m\]You need to login to perform this action.
You will be redirected in
3 sec