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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.


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