Calculate the acceleration of the seed

Question:

1 A record turntable is rotating at 33rev/min. A watermelon seed is on the turntable 7.0 cm from the axis of rotation.

(a) Calculate the acceleration of the seed, assuming that it does not slip.

(b) What is the minimum value of the coefficient of static friction between the seed and the turntable if the seed is not to slip?

2) A rectangular coil of wire 22.0cm by 35.0cm and carrying a current of 1.60A is oriented with the plane of its loop perpendicular to a uniform 1.60Tmagnetic field, as shown in the figure (Figure 1) .

C. The coil is now rotated through a 30.00o angle about the axis shown, the left side coming out of the plane and the right side going into the plane. Calculate the net force that the magnetic field exerts on the coil. (Hint: In order to help visualize this three-dimensional problem, make a careful drawing of the coil as viewed along its axis of rotation.)

D. Calculate the torque that the magnetic field exerts on the coil in part (C).

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