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Class 10th ICSE question (Physics work energy).. |
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Answer» he KINETIC ENERGY of moving body is equal to be the product of the mass(m) of the body and square of its speed(v2).Kinetic energy =21×mass×(speed)2i.e., =21mv2Let mass of man is Mkg and speed is v and speed body is V1, the21Mv2=21{212Mv12} ...........(i)when man speed up by 1m/s, thanv=v+1∴21M(v+1)2=21{2M}⋅v12 .............(ii)DIVIDING Eqs. (i) by (ii), we get(v+1)2v2=212v=v+1v=2HOPEthis helps you please make myanswer as brainlist and follow me...plzzz |
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