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Dmitrij [34]
3 years ago
13

I need help please!!!

Mathematics
1 answer:
tangare [24]3 years ago
3 0

Answer:

it's yes

Step-by-step explanation:

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melamori03 [73]
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3 years ago
1. Last week Bradley worked 32 hours
LuckyWell [14K]

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Step-by-step explanation:

5 0
3 years ago
If θ=0rad at t=0s, what is the blade's angular position at t=20s
babunello [35]
The attached figure represents the relation between ω (rpm) and t (seconds)
To find the blade's angular position in radians ⇒ ω will be converted from (rpm) to (rad/s)
              ω = 250 (rpm) = 250 * (2π/60) = (25/3)π    rad/s
              ω = 100 (rpm) = 100 * (2π/60) = (10/3)π    rad/s

and from the figure it is clear that the operation is at constant speed but with variable levels
            ⇒   ω = dθ/dt   ⇒   dθ = ω dt

            ∴    θ = ∫₀²⁰  ω dt  
 
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       ω = 100 (rpm) = (10/3)π            from t = 15 to t = 20

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the third integral = (10/3)π t = (25/3)π (20-15) = (50/3)π

∴ θ = 0 + (250/3)π + (50/3)π = 100 π

while the complete revolution = 2π
so instantaneously at t = 20
∴ θ = 100 π - 50 * 2 π = 0 rad

Which mean:
the blade will be at zero position making no of revolution = (100π)/(2π) = 50
















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Answer:

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Step-by-step explanation:

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