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jmnie131095
2 năm trước
một vật 500gam được ném thẳng đứng từ mặt đất lên cao với vận tốc 10m/s . Lấy g=10m/s2 a.Tìm đó cao cực đại mà vật lên được b.Khi vật đi qua vị trí M có thế năng bằng 3 lần động năng , hãy tính vận tốc của vật tại vị trí đó .
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