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Q1. A rotating flywheel that is brought up at its maximum speed (3000 rpm) stores how much energy? The flywheel is a solid cylinder of mass 1000 kg and a diameter of 1.0 m. ( I = MR2/2 ) Remember that the energy stored in a rotating mass is equal to one-half of the product of the "moment-of-inertia" multiplied by the square of the rotational speed.. (A good quality battery for your car will store about 2 MJ, and weighs about 50 pounds)
Q2. A mass of 1.62 kg stretches a vertical spring 0.328 m. If the spring is stretched an additional 0.136 m and released, how long does it take to reach the (new) equilibrium position again?
What is momentum of the system immediately after the pack is thrown?
A very long non conducting cylinder of diameter 10.0 cm carries charge distributed uniformly over its surface. Each meter of length carries +5.50 C of charge. A proton is released from rest just outside the surface.
What is ratio of the applied force
What is the coefficient of static between crate and incline
A crate with mass 35.5 initially at rest on a warehouse floor is acted on by a net horizontal force of 120. What acceleration is produced.
Light from a He-Ne laser (= 632.8) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.10 from the slits. The figure shows the interference pattern observed on the screen.
A vertical scale on a spring balance reads from 0 to 160 N. The scale has a length of 12.5cm from the 0 to 160 N reading. A fish hanging from the bottom of spring oscillates vertically at the frequency of 2.30 Hz. ignoring the mass of the spring, wha..
F ind the speed of the golf ball just after impact
One mole of nickel (6E23 atoms) has a mass of 54 grams, and its density is 8.9 grams per cubic centimeter. You have a long thin bar of nickel, 2.0 m long, with a square cross section, 0.12 cm on the side.
What is braking distance for the first train
If the light from the spotlight strikes the mirror at an angle to the normal, what angle to the normal would you expect for the reflected rays.
What is electric field in the wire
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