Canadian Olivia Oliver broke the Guinness World Record for the fastest spin on ice skates on January 2015 with an angular velocity of 342 rpm. Going into the spin, her arms and left leg are extended outwards and she spins at about 130 rpm. Then to speed up, she draws her arms and leg inwards, decreasing her moment of inertia. (A) What is the ratio of the moment of inertia before pulling in her arms and legs to the point where she is spinning fastest? (B) To achieve a final angular velocity of 375 rpm, how much faster would her initial an- gular velocity have to be?
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Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied
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What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?
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The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?
Answers: 2
Canadian Olivia Oliver broke the Guinness World Record for the fastest spin on ice skates on January...
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