A2.6 kg mass weighs 25.74 n on the surface of a planet similar to earth. the radius of this planet is roughly 7.3 × 106 m. calculate the mass of of this planet. the value of the universal gravitational constant is 6.67259 × 10−11 n · m2 /kg2

Will you chech and finish these for me, because i am stumped with them.

Which articulations allow for greatest range of motion?

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].