InterviewSolution
Saved Bookmarks
| 1. |
What work must be done to stop a bullet moving with a velocity of 2000ms^-1 and having a mass of 50g?(a) 10^5J(b) 10^6J(c) 10^4J(d) 10^7JThe question was asked by my college director while I was bunking the class.I'd like to ask this question from Kinetic Energy in division Work, Energy and Power of Physics – Class 11 |
|
Answer» RIGHT OPTION is (a) 10^5J The BEST I can explain: Work done against a BODY is the energy LOST (kinetic) by it. Energy formula is 0.5*m*v^2. So, 0.5*(50/1000)*2000^2 = 10^5. |
|