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ctvloga205
2 năm trước
Một vật có khối lượng m=1kg được thả rơi tự do từ độ cao h=10m so với mặt đất. Bỏ qua sức cản không khí, lấy g= 10m/s^. a) Xác định vận tốc của vật ngay trước khi chạm đất? b) Xác định vận tốc của vật sau 1s kể từ lúc thả vật? c) Xác định quãng đường vật rơi được tính từ lúc thả đến khi động năng bằng thế năng? Mong nhận được câu trả lời từ các bạn, cảm ơn rất nhiều!
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