Quiz 06 (10 pts) D The two rotating systems shown in the figure 4) A wrench is a
ID: 1795888 • Letter: Q
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Quiz 06 (10 pts) D The two rotating systems shown in the figure 4) A wrench is acting on a nut trying to turm it The differ only in that the two identical movable masses length of the wrench lis directly to the east of the are positioned at different distances from the axis of nut A force 150.0 N acts on the wrench at a postion rotation. If you release the hanging blocks simultaneously from rest, and if the ropes do not300° north of east. What is the magnitude ef the slip, which block lands first? A) The block at the left lands first. la Mg 15 0 cm from the center of the put in a direction torque about the center of the nut A) 22.5Nm : B) 11.3 Nm:0193 Nm D) 2250 N im : E) 1949 Nm B) The block at the right lands first. C) Both blocks land at the same time. D) Not enough information b S 5,Aslid, uniform sphere of mass 20 kg and radius 1.7 m rolls from rest without slippiag down an 2) A tire is rolling along a road, without slipping. inclined plane of height 70 m What is the angular with a velocity v. A piece of tape is attached to the velocity of the sphere at the bottom of the inclined tire When the tape is opposite the road (at the top of plane? the tire), its velocity with respect to the road is A) 2v B) v : C)1.5v : D) zero A) 5.8 rad's B)99 rad's C 1I rad's. D) 7.0 rads Fr Ra E) The velocity depends on the radius of the tire Possbly usetfu Equations 3) A 4.50-kg wheel that is 34 5 cm in diameter rotates through an angle of 13.8 rad as it slows down uniformly from 22.0 rad's to 13 5 rads What is the magnitude of the angular acceleration of the wheel? A) 0.616 rads B)5 45 rad's: C111 rad's D) 22.5 rads. ; E) 10.9 rad/s. a + 2a(e- vwExplanation / Answer
For the first part information is insuficient as
T = mg R = I alpha
alpha= mgR/I
t = sqrt(2 theta/ alpha)
Hence we need R to find t.
Answer is D
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