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# src="/qa/attachment/10699552/" alt="Screen Shot 2019-10-01 at 9.16.34 PM.png" />Moment of Inertia and Torque Attachment 1 Attachment 2 Attachment 3 ATTACHMENT PREVIEW Download attachment Screen Shot 2019-10-01 at 11.10.57 AM.png 1 To loosen a nut on an engine a torque of 48N m is required. What is the minimum force with which this can be achieved if the length of the spanner (wrench) used is 23 cm? 2 a Determine the torque provided by the couple shown in Figure 14.4 if the force is 42 N, r = 8.3 cm and the angle 9 is 53°. b Sketch a graph to show how the torque varies when the object moves from horizontal to vertical (assume that the directions of the forces do not change). 3 Consider Figure 14.4. Does the magnitude of the torque provided by the couple depend on the position of the axis of rotation? Explain your answer. ATTACHMENT PREVIEW Download attachment Screen Shot 2019-10-01 at 11.11.28 AM.png 5 Estimate the moment of inertia of the Earth in its orbit around the Sun (mass of Earth = 6 x 1024kg, distance to Sun = 150 Mkm). 6 a What is the moment of inertia of a spinning golf ball of mass 46g and radius 21 mm? b What assumption did you make in answering (a)? ATTACHMENT PREVIEW Download attachment Screen Shot 2019-10-01 at 9.16.34 PM.png

(5) . Moment of Inertial ( I) = MR2 = (6x 102# kq) (150 Mkm)2
=
1.35x10 Kq-m
[ : 1 MKm = 1 x10 x10 m = Ixlon
6)
(@ . Moment of inertion of cusphere ( I) = 2 MR2
= 2 x ( 46 9 ) x ( 21 mm ) 2
[M =...

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