Two people are moving a heavy desk. One person pulls to the right with a force of 25 Newtons, while the other pushes to the right with a force of 50 Newtons. There is also 20 Newtons of friction pointing to the left. What is the net force on the desk? A. 0.5 m/s^2
B. 0 N
C. 55 N
D. 95 N

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The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].