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InterviewSolution
| 1. |
Derived the formula of kinetic energy |
| Answer» As Work done= Force*DisplacementAnd force=Mass*acceleration (ma) and Displacement ( distance or s)= 2as=v2-u2 s=v2-u2/2aTherefore, W=ma*v2-u2/2aa and a got cancelled (means from ma and 2a ,a gets cancelled)As object is starting from rest position u2=0Therefore, m*v2/2And take 2 as a whole and hence formula is derived,1/2 mv2You may also consult NCERT class 9 for better understanding ! | |