railway RRB Technician Grade 3 Mock Test 2024 General Science Physics Work Power Energy

ଯେତେବେଳେ ଏହାର ଗତି 25 ମି/ ସେ ରୁ 15 ମି/ ସେ କୁ କମିଯାଏ, ଏକ କାର 200 kJ ଗତିଜ ଶକ୍ତି ହରାଇଥାଏ। ଟନ୍ ରେ  ଏହାର ବସ୍ତୁତ୍ଵ  ନିର୍ଣ୍ଣୟ କର।

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