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Two point masses, each of mass 5 kilogram are joined by a light straight rod of length 1 meter. This "dumbbell" is located on a horizontal frictionless surface, and set into rotation, about a vertical axis through the center of mass, with an angular speed of 4 rad/s. Suddenly, the rod twice in length.
1. Find the initial moment of inertia of the system?
2. Find the initial angular momentum of the system?
3. Find the initial kinetic energy of the system?
4. Find the final angular velocity of the system?
5. Find the final kinetic energy of the system?
A potter's wheel having a radius 0.48 m and a moment of inertia of 12.3 kg · m2 is rotating freely at 55 rev/min. Find the effective coefficient of kinetic friction between the wheel and the wet rag
Quentin is lifting a 10 kg dumbbell by pulling upward on it with a 108.1 N force. What is the acceleration of the dumbbell
A uniform line charge of linear charge densitylambda=3.6nC/m extends fromx= 0 tox= 5 m What is the total charge?
A carbon dioxide laser emits a sinusoidal electromagnetic wave that travels in vacuum in the negative x-direction, Write vector equations for E and B as functions of time and position
The left ventricle of the heart accelerates blood from rest to avelocity of +24cm/s. How much time does blood take to reach its final velocity?
You're designing a toy rocket to be launched by a spring. The launching apparatus has room for a spring that can be compressed 14cm, and the rocket's mass is 65 g. If the rocket is to reach analtitude of 35 m, what should be the spring constant?
A net force that is quadratically increasing in time is applied to an object. What is time dependence of the object's kinetic energy
The critical angle for total internal reflection for sapphire surrounded by air is 34.4°. Calculate the index of refraction of the substance
A 200g ball is tied to a 1.0 meter long string and released from rest @ 60 degree angle. it swings down and at the very bottom collides with a 1.0kg block. the block is resting on a frictionless surface and is connected to a 20cm long spring with ..
A jewelry maker has asked your glass studio to produce a sheet of dichroic glass that will appear red for transmitted light, how thick should the coating be
Unpolarized light passes through two polarizers in turn with polarization axes at 41° to one another. What is the fraction of the incident light
find out the magnitude of the gravitational force exerted by one on the other.
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