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Elisha Balogun
Answers (1)
PE at 100m=mgh =2*10*100 =20*100 =2000J PE at 30m=mgh =2*10*30 =20*30 =600J total energy at 30m=PE KE 2000=600 KE 2000-600=KE KE=2000-600 KE=1400J =14kj
