Physics, 28.11.2021 06:00 oof529

Từ độ cao 20m, người ta ném hòn đá nặng 196g với vận tốc đầu 72km/h, dưới góc ném 25°, cho gia tốc trọng trường g = 10m/s2. Hãy xác định: a. Phương trình chuyển động – phương trình quỹ đạo của chất điểm.

b. Thế năng của hòn đá ở độ cao cực đại.

c. Động năng của hòn đá sau khi ném 1s.

d. Động năng của hòn đá khi chạm đất.

Answers: 2

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Từ độ cao 20m, người ta ném hòn đá nặng 196g với vận tốc đầu 72km/h, dưới góc ném 25°, cho gia tốc t...