Réponse:
Bonjour
1)
v = d/∆t
v = 200/10,865
v = 18,4 m/s
2)
Ec = ½mv²
Ec = ½×58×18,4²
Ec = 9826 J
3)
2Ec = mv²
v² = 2Ec/m
v = √(2Ec/m)
v =√(2×9826/100)
v = 14 m/s
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Réponse:
Bonjour
1)
v = d/∆t
v = 200/10,865
v = 18,4 m/s
2)
Ec = ½mv²
Ec = ½×58×18,4²
Ec = 9826 J
3)
Ec = ½mv²
2Ec = mv²
v² = 2Ec/m
v = √(2Ec/m)
v =√(2×9826/100)
v = 14 m/s