- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
The kinetic energy of an object of mass ‘$m$’ moving with a velocity of $5\ ms^{-1}$ is $25\ J$. What will be its kinetic energy when its velocity is doubled ?
As given, mass of the object $=m$
Velocity of the object $v=5\ ms^{-1}$
Kinetic energy of the moving object $K=25\ J$
Or $\frac{1}{2}mv^2=25$
Or $m( 5)^2=50$
Or $25m=50$
Or $m=\frac{50}{25}=2\ kg$
When the velocity is doubled, the velocity becomes $v=2\times5=10\ ms^{-1}$
Kinetic energy when the velocity is doubled $=\frac{1}{2}\times2\times( 10)^2$
$=100\ J$
Advertisements
To Continue Learning Please Login
Login with Google