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postnew [5]
3 years ago
14

Một cái đĩa có bán kính R quay quanh trục vuông góc và đi qua tâm đĩa theo phương trình ϕ = at3 + bt2 + c;Tìm gia tốc tiếp tuyến

, gia tốc pháp tuyến, gia tốc toàn phần của một điểm trên vành đĩa ở thời điểm t.Biểu diễn các véc tơ gia tốc trên bằng hình vẽ
Physics
2 answers:
Rama09 [41]3 years ago
5 0

Answer:

Gnlhjsfyjjgisiidisc. Gihiingiifciucuc

Goryan [66]3 years ago
3 0

Answer:

sétgrgsgsfgsfgs

Explanation:

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A string is wrapped around a pulley with a radius of 2.0 cm. The pulley is initially at rest. A constant force of 50 N is applie
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Answer:

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Explanation:

Let the linear velocity of the rope(=of pulley) is v m/s

Using kinematic equation

=> v = u + at

=>v = 0 + 4.9a

=>v = 4.9a ------------ eq1

By v^2 = u^2 + 2as

=>v^2 = 0 + 2 x v/4.9 x 1.2

=>4.9v^2 - 2.4v = 0

=>v(4.9v - 2.4) = 0

=>v = 2.4/4.9 = 0.49 m/s

Thus by v = r x omega

=>omega = v/r = 0.49/0.02 = 24.49 rad/sec

BY W = F x s = 50 x 1.2 = 60 J

=>KE(rotational) = W = 1/2 x I x omega^2

=>60 = 1/2 x I x (24.49)^2

=>I = 0.20 kg-m^2

5 0
3 years ago
What do we call magnets that are only magnetized when they are within an existing magnetic field?
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3 years ago
How to solve question #2?
Vera_Pavlovna [14]
2a for example the first one,2sec. You know that every second it moves 3metres further. So 2x3=6 but you start at 0.50m so 6+0.50=6.5
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3 years ago
What types of materials can make up sediments?
GREYUIT [131]

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