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Hunter-Best [27]
3 years ago
6

Một trụrỗng có khối lượng 50 kg, đường kính 1m, đang quay vớivận tốc800 vòng một phút. Tác dụng vào trụmột lực hãm tiếp tuyến vớ

i mặt trụvà vuông góc với trục quay. Sau 2 phút 37 giây, trụdừng lại. Tìm:a –Mômen hãmb –Lực hãm tiếp tuyến
Physics
1 answer:
satela [25.4K]3 years ago
6 0

Answer:

i now peklat mo sa pewet

Explanation:

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A ball is thrown horizontally from a 19 m -high building with a speed of 2.0 m/s . How far from the base of the building does th
bazaltina [42]
Using the formula: ΔY = V₀y * t + (1/2) * ay * t²

Solve for time and get: 1.968s

Then use: v = d/t in the x-direction and get: d = 3.936
3 0
3 years ago
A tiger runs one kilometer. The tiger does 15,000 J of work and has a total power output of 500 W. How many minutes does it take
defon
Power is the amount of energy consumed per unit time. Having no direction, it is a scalar quantity. <span>As is implied by the equation for </span>power<span>, a unit of </span>power <span>is equivalent to a unit of work divided by a unit of time. The formula would be as follows:

P = W/t 

We calculate as follows:

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3 0
3 years ago
4. A high school athlete runs 400 m in 52.20 sec. What is his speed in mph?<br> 14100<br> 1110
Serggg [28]

Answer:

28,800m/p second

Explanation:

Calculate the distance per second so, 400m/50 s= 8m/p second now knowing the speed/hour and knowing an hour has 3,600 seconds,multiply it by 8 then you will get 28,800m/p second, or 28.8km/h

3 0
2 years ago
Are white clouds transparent opaque or translucent
Kamila [148]
Believe it or not white clouds can be both opaque and transparent depending on the volume and mass within that cloud. The heavier the cloud, the more opaque it'll seem, but the lighter the cloud is, it'll seem transparent-
4 0
3 years ago
The range of a projectile fired at an angle with the horizontal and with an initial velocity of feet per second is where r is me
77julia77 [94]

Answer:

θ = 8.50°

To the nearest angle

θ = 9.0°

the golfer must hit the ball at angle 9° so that it travels 120 feet.

Explanation:

The range of a projectile is the horizontal distance covered by a projectile, which can be written as;

r = (u^2× sin2θ)/g

Where;

r = range

u = initial speed

θ = angle from horizontal

g = acceleration due to gravity

Solving for θ,

sin2θ = rg/u^2

θ = 1/2 × sin⁻¹(rg/u^2) ....1

Given;

r = 120 ft

u = 115 ft/s

g = 9.81m/s = 32.2 ft/s

Substituting the values into the equation 1;

θ = 1/2 × sin⁻¹(120×32.2/115^2)

θ = 1/2 × sin⁻¹(0.29217)

θ = 1/2 × 17.00

θ = 8.50°

To the nearest angle

θ = 9.0°

5 0
3 years ago
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