1. A rotating top has a scratch 0.05 m from the vertical axis of rotation. In...

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Physics

1. A rotating top has a scratch 0.05 m from the vertical axis ofrotation. In the time it takes the top to rotate 81 degrees, itrotates radians or revolutions. Furthermore, the scratchmoves a length of arc of in space. Give your answers to threedecimal places.
2. A rotating top has a scratch 0.05 m from the vertical axis ofrotation. It increases the angular velocity from 20 rad/s to 40rad/s in 4 seconds. The angular acceleration of the top israd/s^2. The tangential acceleration of the scratch is __m/s^2.Give your answers to two decimal places.
3. A skater is spinning at 2 rev/s. she increases her angularvelocity in 7 seconds until it is 8Ï€ rad/s. Bywhat angle, in degrees, does she rotate in that time?
4. A skater is spinning at 0.6 rev/s. What angular accelerationis necessary. In units of rad/s^2, to increase her angular velocityto 9 rad/s while she rotates by an angle of 1000 degrees.

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3.6 Ratings (386 Votes)

Question 1Distance of the scratch from the vertical axis of rotation R 005 mAngle through which the top rotates 81 degreesConverting the angle to radians 2 rad 360degrees 1414 radConverting the angle to revolutions 360 degrees 1revolution 0225 revLength of the arc the the scratch moves LL R Here isin radiansL 0051414L 0071 See Answer

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