Learning Goal: The double collar B is driven around the ring with radius R = 10 cm shown in (Figure 1) by the rotation of OA. The equation of the ring can be written in polar form with the origin at O as r= (20 cos 0) cm. When = 40° the arm is rotating at 0= 2 rad/s and accelerating at E = 0.5 rad/s² The collars have a combined mass of m=0.8 kg. What is the magnitude of the force exerted by the ring on the collars? What is the magnitude of the force exerted by the arm on the collars? Figure R 1 of 3

FBD: The mass of a pendulum is connected to a spring with a spring constant Kas shown in the figure. The spring stays vertical all the time with the help of a massless follower. The vertical distance between the fixed point O and the path of the massless follower is 2L. Use Newton's second law and find the equation of motion of the system in terms of 0. 762 mgbi Img 2L L bil Nig K 777777 P EMO = Jaz ->0₂ ?

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Answer the following question part a and part b A) The 4 kg disk shown in Figure Q1 is initially at rest. A force of F = 50 N is applied to the thin, inextensible cable wrapped round the disk diameter d = 156 mm. Calculate the work done on the disk after it has turned through 8.8 revolutions. [Answer in J] 30 Q1 b) Assuming that the 8 kg disk in previous part is initially at rest and a force of F = 67 N is applied to the thin, inextensible cable wrapped round the disk diameter d = 177 mm. Find the angular velocity of the disk after it has turned through 8.1 revolutions. [Answer in rad / s]