Two children are riding on a merry - go - round, Child A is twice as far from th

Question

Two children are riding on a merry - go - round, Child A is twice as far from the axis of rotation as is Child B . We can say : Child A has four times the angular speed of Child B Child A has twice the angular speed of Child B Child B has twice the angular speed of Child A Child A and Child B both have the same angular speed A fisherman is reeling in a fish. In 6.30 see he winds 2.00m of fishing line onto a reel whose radius is 0.039m (assume constant radius ). If the line is being reeled in at a constant speed, determine what that angular speed is (in radians per second). 0.317 rad/ sec 3.15 rad/sec 1.30 rad/sec 51.3 rad/sec 8.14 rad/sec A force of 40.0 N is applied to the end of a 0.710 m long torque wrench at an angle 45 degree from a line joining the pivot point to the handle . What is the magnitude of the torque generated about the pivot point 7.57 N.m 9.71 N.m 28.4 N.m 20.1 N.m A 10.0 kg solid cylinder with a 50.0 cm radius has a torque of 2.00 N m applied to it. The resulting angular acceleration would be :1.6 rad/s^2. 1.8 rad/s^2 .2.1 rad/s^2 .2.3 rad/s^2.

Explanation / Answer

14) option d)

15) w=l/(r*t)
So, w=2.0m/(.039m*6.3s)
w=8.14 rad/s (option e)

16) Torque=rFsin45=0.71*40*0.707=20.1 Nm (option d)

17) I=0.5mr2 =0.5*10*0.5^2 =1.25 Kgm^2

Torque=2.0 Nm

Angular acceleration=Torque/I =2/1.25=1.6 rad/s2 (option a)

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