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A spinning disk of mass 5.0 kg and radius 0.25m is rotating about an axis through its center at 400 rev/min. a.) What is the angular velocity of the disk in rad/s? b.) What is the moment of inertia of the disk? c.) If it accelerates at a constant rate to 900 rev/min in 8 sec, what is its angular acceleration? d.) What constant torque is required to produce this acceleration? e.) When it reaches that speed, what is its kinetic energy? f.) When it reaches that speed, what is its angular momentum?
A kid is outside his home playing with a metal hoop and stick. If the hoop starts from rest at the top of the hill and reaches a linear speed of 9.50 m/s in 11.5 s, what is the angular acceleration of the hoop
A proton having an initial velocity of 22.7 Mm/s enters a uniform magnetic field of magnitude 0.320 T with a direction perpendicular to the proton's velocity. It leaves the field-filled region with velocity -22.7 Mm/s.
An oscillator with a mass of 530 g and a period of .80 s has amplitude that decreases by 2 percent during each complete oscillation. At what time will the energy be reduced to 33 percent of its initial value.
A mass attached to a spring vibrates 15 times in 23.13 seconds. What is the linear frequency (in Hertz) of the mass
A molecule of DNA (deoxyribonucleic acid) is 2.28 µm long, Determine the effective spring constant of the molecule
At one instant a bicyclist is 75m due east of a park's flagpole, going due south with a speed of 13.0 m/s. Then, 10s later, the cyclist is 65 m due north of flagpole, going due east with a speed of 20.0 m/s.
A capacitor is discharged when a wire is connected across its terminals, How much energy is released for a 1.00 uF capacitor with 10.0 V across its plates
A truck is traveling on a level road. The driver applies the brakes causing the truck to decelerate by an amount g/2. This causes a box in the rear of the truck to slide forward. If the coefficient of sliding friction between the box and the truckbed..
A hydraulic jack is made with a small piston 1.3 cm in diameter that is used to move a large piston 5.2 cm in diameter. how heavy a load can he lift with the jack
After hitting a long fly ball that goes over the right fielder's head and lands in the outfield, how much work was done on the player by friction
A 190 pF capacitor is charged to a potential difference of 120 V, and the charging battery is disconnected. The capacitor is then connected in parallel with a second (initially uncharged) capacitor. If the measured potential difference drops to 100 V..
Suppose your waffle iron is rated at 1.20 kW when connected to a 3.00 102 V source. What current does the waffle iron carry
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