Answer:
work output is always less than work input - the ratio is less than 1.
Explanation:
This principle comes from the fact that a machine or system cannot produce more work than is supplied to it, because this would violate the energy conservation law (work is a type of mechanical energy).
In theoretical machines called "ideal machines" the input work is the same as the output work, but these machines are only theoretical because in real applications there is always some type of energy loss, either in heat produced by a machine or processes for its operation, for this reason the output work is always less than the input work.
Regarding the ratio work output to work input:
because work input WI is always greater than work output WO.
Answer:
44 ohm, 145 ohm
Explanation:
R = 44 ohm, L = 2.2 mH = 2.2 x 10^-3 H
At f = 60 Hz
XL = 2 π f L = 2 x 3.14 x 60 x 2.2 x 10^-3 = 0.82896 ohm
Impedance,
Z = 44 ohm
At f = 10 kHz = 10000 Hz
XL = 2 π f L = 2 x 3.14 x 10000 x 2.2 x 10^-3 = 138.16 ohm
Impedance,
Z =1 45 ohm
Answer:
a = g (m₂ -m₁ sin θ) / (m₁ + m₂)
Explanation:
To solve this we must locate a reference system in the inclined plane, in this case the axis eg. it is parallel to the plane and the axis and is perpendicular to the plane, we take the direction to the right as positive.
Let's write Newton's second law for block 1 on the plane
X axis
T - Wₓ = m₁ a
Y Axis
N – = 0
We use trigonometry to find the components of the weight
sin θ = Wₓ / W
Wₓ = W sin θ
cos θ = W_{y} / W
W_{y}= W cos θ
We substitute
T - m₁ g sin θ = m₁ a
N = m₁ g cos θ
We write Newton's equations for block 2 that is hanging.
Note that if block 1 goes up, block 2 must go down, therefore for this block the positive direction is down.
W₂ - T = m₂ a
Let's write the system of equations
T - m₁ g sin θ = m₁ a
m₂ g - T = m₂ a
Let's add
m₂ g - m₁ g sin θ = (m₂ + m₁) a
a = g (m₂ -m₁ sin θ) / (m₁ + m₂)
Acceleration is the same for both blocks as they are connected by a rope
Answer:motor
Explanation: the shaft in a motor is what rotates