Answer:
Sound energy (that is, mechanical vibrational waves passing through an elastic medium) is a combination of kinetic and potential energies. As the wave compresses the medium (storing elastic potential energy) the medium comes to rest (no motion so no kinetic energy).
Explanation:
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The position of the particle when it changes direction is x = 3.0 m
Explanation:
The position of the particle is given by the equation
In order to determine its position when it changes direction, we need to find the time t at which the velocity of the particle becomes zero.
The velocity of the particle si given by the derivative of the position, therefore:
The velocity is zero when:
And therefore, the position at t = 0.41 s is
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I think the answer is c. the more characteristics they have in common. Sorry if wrong.
Answer:
A-18500J
B-232.5 rad/s
Explanation:
A- As the cylinder rotates through 1000rad, it sweeps a distance of
So the work, which is distance times force, of the tension done on the cylinder through that distance is
W = Td = 50 * 370 = 18500 J[/tex]
B- The torque that exerts on the cylinder by the tension is
To = TR = 50*0.37 = 18.5 Nm
As the cylinder is hollow, its moments of inertia is
The torque is generating an angular acceleration of:
The time it takes to go from rest to 1000 rad
Therefore the final rotational speed is
Answer: 3MW
Explanation:
W = 1/2 mv^2
W = 0.5 x 1200 x 25^2 = 375 kW
T = 8s
P= 335 x 10^3 x 8 = 3,000 kW = 3MW