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Sliva [168]
3 years ago
10

The uniform 100-kg beam is freely hinged about its upper end A and is initially at rest in the vertical position with theta = 0.

Determine the initial angular acceleration of the beam and the magnitude of the force FA supported by the pin at A due to the application of the force P = 300 N on the attached cable.

Physics
1 answer:
max2010maxim [7]3 years ago
4 0

Answer:

ac = 2.86 m / s²

Explanation:

Image can detail the system to determine the force in the FA to understand the system into the applicated force

m = 100 kg ,  L = 3 m

∑ F = 0 ⇒ Ay - 100 kg + P * cos (45) = 0

Ay = 768.86 N

∑ Mₐ = α * I ₐ

I ₐ = m * L² / 3  ⇒  I ₐ = 100 kg * 4² m / 3

Replacing

P * sin (45) * 3 = α * 100 kg * 4² m / 3  

α = 1.193 rad / s²

ac = α *2    ⇒  ac = 1.193 rad / s²  * 2

ac = 2.86 m / s²

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The bullet will strike the target placed in 324.0 m in the East in 0.45 seconds.

<u>Explanation:</u>

As we all know the epic relation between distance, speed and time; we cam easily estimate the time in which an object can reach to the destination or target.

As here in this case, we know the distance of the target and the velocity of a bullet exerted from a rifle given as follows,

Distance of the Target from the rifle edge = 324.0 m

Velocity of bullet exerted from the rifle = 720 m/s

Since we know that,

      \text {velocity}=\frac{\text {distance}}{\text {time}}

or

       \text {Time}=\frac{\text {distance}}{\text {velocity}}

We can simply implement all the values in the formula and get the results i.e the time required by the bullet to hit the target. Since both the values are in S.I units measures, we don't need to change or convert any of them. Hence,

       \text { Time }=\frac{324}{75}=0.45 \text { seconds }

Therefore, the bullet will hit the target in 0.45 seconds.

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3 years ago
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Solnce55 [7]

Answer:

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Which is correct about the charge movement when a battery is connected to copper wire?a.)Electrons leave the positive battery te
professor190 [17]

Answer:

b.)Electrons leave the negative battery terminal and electrons enter the positive terminal.

Explanation:

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3 years ago
While standing on a bridge 15 m above the ground, you drop a stone from rest. When the stone has fallen 3.2 m, you throw a secon
AURORKA [14]

Answer:

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Explanation:

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Find: t

Δy = v₀ t + ½ at²

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t = 0.81 s

Next, find the time for the first stone to land.

Given:

Δy = 15 m

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a = 9.8 m/s²

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Δy = 15 m

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v₀ = 11.3 m/s

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11111nata11111 [884]

Answer:

Quantum theory states that electromagnetic radiation travels in discrete amounts with energy

h ν = E = h c / f

3 0
2 years ago
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