railway RPF Constable Mock Test Series 2024 General Science Physics Work Power Energy

2 kg द्रव्यमान वाले एक पिंड की गतिज ऊर्जा 100 J है। पिंड का वेग होगा:

1

10 m/s

2

0 m/s

3

50 m/s

4

20 m/s

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