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I face some problems answering below questions. Anyone can help to answer?

Q1: One end of a string of length 1.0m is tied to body of mass 0.5kg. It is whirled in a vertical circle. If its angular speed is 3rev/s, calculate the tension in the string at the highest and lowest points.

Q2: (a) Calculate the angular speed of the earth.

(b) Calculate the

(i) Energy

(ii) Torque and (iii) average power

required to accelerate the Earth in 1 day from rest to its present angular speed.

(Mass of the Earth : 6x10 power 24 kg , radius of erath = 6400km)

Thanks.

Regards,

Alex

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# Homework Help: Need some help to answer Some questions

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