FIGURE 4.4 shows three objects A, B and C are kept in static equilibrium. The mass of B is 2.0 kg. Object A is just about to slide on the table. The coefficient of static friction between A and the horizontal table is 0.30. Calculate the
(a) mass of C = 2.83 kg
(b) mass of A = 6.67 kg

Help me out please, i want to cry.. the answer is already given. But i want to know the working

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

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