Figure 2 shows a man of 65 kg playing skateboard. He had an initial speed of 3 m/s when descending the stairs at a height of 2.5m. Calculate the man's potential energy when his speed is 7m/s.
Rajah 2 menunjukkan seorang lelaki berjisim 65kg sedang bermain papan selaju. Dia mempunyai kelajuan awal 3 m/s ketika menuruni tangga tersebut pada ketinggian 2.5m. Kirakan tenaga keupayaan ketika kelajuannya adalah 7m/s.
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Figure 2 shows a man of 65 kg playing skateboard. He had an initial speed of 3 m/s when descending the stairs at a height of 2.5m. Calculate the man's potential energy when his speed is 7m/s.
Rajah 2 menunjukkan seorang lelaki berjisim 65kg sedang bermain papan selaju. Dia mempunyai kelajuan awal 3 m/s ketika menuruni tangga tersebut pada ketinggian 2.5m. Kirakan tenaga keupayaan ketika kelajuannya adalah 7m/s.
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