Ahollow steel shaft is to transmit 4200 n. m of torque and is to be sized so that the torsional stress does not exceed 120 mpa

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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