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A helicopter has 3 blades, each of them are 5.20m long and has a mass of 220kg.(each blade has a mass of 220kg, not the sum of the 3) The rotor is rotating at 385 rev/min.
a)What is the rotational inertia of the rotor assembly about the axis of rotation? (Each blade can be considered to be a thin rod rotated about oneend.)
b) What is the total kinetic energy of rotation?
The scale of a spring balance reading from 0 to 235rm {N} has a length of 15 rm{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.7rm {Hz}. What is the mass of fish? In Kg.
A spring is hung vertically and has a length of 50 cm when no mass is on it. What is its spring constant
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A 722 kg car stopped at an intersection is rear-ended by a1620 kg truck moving w/ a speed of 14.5 m/s. What is the speed of the wreck immediately after the collision
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To explore how voltage and current are related in a simple circuit composed of power sources and resistors arranged in series and then arranged in parallel
A current of 2.50 Amp flows through a 1.00 millimeter diameter copper wire that is connected to a capacitor plate. Obtain the charge transferred to the plate in 1.00 x 10^3 second
The angle of incidence of a light beam onto a reflecting surface is continuously variable. The reflected ray in air is completely polarized when the angle of incidence is 49.2°. What is the index of refraction of the reflecting material?
The space shuttle orbits at a distance of about 300 km above the surface of the earth. Find the speed of the shuttle
Points A and B have electric potentials of 320 and 160, respectively. When an electron released from rest at point A arrives at point C, its kinetic energy is.
A bullet is fired from a gun whose barrel is 0.600 m long. The bullets mass is 5.00 g and its velocity is 300m/s when it leaves the gun's muzzle. what was the average force acting on the bullet
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