Question 2CSlowing downThe figure provided shows a rotating wheel. Which statement below is true for the angular velocity and angular acceleration?The angular velocity and angular acceleration are both negative.The angular velocity and angular acceleration are both positive.The angular velocity is positive and the angular acceleration is negative.The angular velocity is negative and the angular acceleration is positive.Question 3The fiqure provided shows

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Answered: The figure provided shows a rotating…

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An electrical motor spins at 2850 rpm. The armature radius is 2.68. What is the angular velocity in radian/seconds? B) Through what angle does the motor turn in 0.25 s?
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1. A centrifuge rotor is accelerated for 25. s from 2000 rpm to 12000 rpm (revolutions per minute). (a) What is its average angular acceleration? (b) Through how many revolutions has the centrifuge rotor turned during its acceleration period, assuming constant angular acceleration? (a) Need This to answer (b) (b) Answer (2_S.F. Do not round till the end) 2. A bicycle slows down uniformly from v0 = 8.89 m/s to rest over a distance of 124 m, Fig. 8–9. Each wheel and tire has an overall diameter of 50 cm. Determine the time it took to stop. 3. A bicycle slows down uniformly from v0 = 7.56 m/s to rest over a distance of 100 m, Fig. 8–9. Each wheel and tire has an overall diameter of 61.4 cm. Determine the time it took to stop 4. If a 59.6 kg person jumps onto a seesaw at an angle of 24 degrees at a distance of 6.4 m from the fulcrum. How much force will their friend feel if they are sitting 7.9 m on the opposite side of the seesaw? 5. If a 44.3 kg person jumps onto a…
What is the angular acceleration (in rad/s^2) of an upper cut punch if velocity at t = 0.15 is 8.1 deg/s and the velocity at t = 0.41 is 13.9 deg/s? Round your answer to two decimal points. If the radius during the uppercut is .92m, what is the tangential acceleration experienced by the knuckles? Round your answer to two decimal points
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When turning on a motor, it reaches a nominal speed of 2,500 rpm in a time of 12 s; when the motor is turned off it takes 42 s to come to a complete stop. If we start from the angular motion is uniformly accelerated, determine the number of revolutions that performs the motor to reach the rated speed and then to stop.
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