Dos masas están conectadas por una cuerda ligera que pasa por una polea sin rozamiento. Determine la aceleración de las masas y
la tensión de la cuerda si m Kg A 20 , m Kg B 50 y 0.20 K A Y B
1 answer:
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Answer
b. the number of atoms in each molecule.
Explanation:
Answer:
Δθ₁ = 172.5 rev
Δθ₁h = 43.1 rev
Δθ₂ = 920 rev
Δθ₂h = 690 rev
Explanation:
- Assuming uniform angular acceleration, we can use the following kinematic equation in order to find the total angle rotated during the acceleration process, from rest to its operating speed:
- Now, we need first to find the value of the angular acceleration, that we can get from the following expression:

- Since the machine starts from rest, ω₀ = 0.
- We know the value of ωf₁ (the operating speed) in rev/min.
- Due to the time is expressed in seconds, it is suitable to convert rev/min to rev/sec, as follows:

- Replacing by the givens in (2):


- Replacing (5) and Δt in (1), we get:

- in order to get the number of revolutions during the first half of this period, we need just to replace Δt in (6) by Δt/2, as follows:

- In order to get the number of revolutions rotated during the deceleration period, assuming constant deceleration, we can use the following kinematic equation:

- First of all, we need to find the value of the angular acceleration during the second period.
- We can use again (2) replacing by the givens:
- ωf =0 (the machine finally comes to an stop)
- ω₀ = ωf₁ = 57.5 rev/sec
- Δt = 32 s

- Solving for α in (9), we get:

- Now, we can replace the values of ω₀, Δt and α₂ in (8), as follows:

- In order to get finally the number of revolutions rotated during the first half of the second period, we need just to replace 32 s by 16 s, as follows:

Force moves the object but if the same anyone force is applied to both sides then it doesn’t move
Answer:
As that liquid water is further heated, it evaporates and becomes a gas—water vapor. So C... Need branliest pls
Explanation:
Answer:
2.5 s, 5 m
Explanation:
The equations for the horizontal and vertical position of Lukalu are:

we can find the time it takes her to reach the ground by requiring that the vertical position becomes zero:
y(t) = 0
So we find:

The horizontal distance of Lukalu instead will be given by the equation for the horizontal position, substituting t = 2.5 s:
