CBSE Class 11 Work, Energy and Power — practice questions
4 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 Work, Energy and Power in the app →A porter carries a $20$ kg bag horizontally for $50$ m at constant height. The work done by him on the bag agaA cricket ball of mass $0.15$ kg moves at $20$ m/s. Its kinetic energy is:A delivery boy raises a $10$ kg sack to a $2$ m shelf in $4$ s. The power expended (using $g = 10$ m/s$^2$) isA carrom coin elastically collides head-on with another identical coin at rest. After collision: