Which of these bodies has redundant constraints for the given loading conditions? F1 and F2 are applied, known forces.

A. In the first choice, the support at A is fixed and a cable connects points B and C.
B. In the second choice, the support at A is a smooth pin, and a cable connects points B and C.
C. In the third choice, the support at A is a single thrust bearing, and a cable connects points B and C.
D. In the fourth choice, the supports at A and B are hinges, and the support at C is a roller.

A. to determine if humans can explore mars safely

Since you have not included the experiment situation and the data, of course, i can not give you specific details about it. but i can you with this question.1) i will assume that the motion is projectile (parabolic) motion.2) yes, the horizontal distance depends on the horizontal velocity as, naming vx the horizontal velocity and t the time, it is: x = vx × t3) now, observe that the flight time depends on the vertical velocity as, naming voy the initial vertical velocity, t the time and y the vertical distance before reaching the ground: y = yo + voy×t - gt² / 2.the higher the initial vertical velocity (voy) the longer the object will be flying and so t will be higher in the equation for the horizontal distance.that explains the relationship between the horizontal distance and the horizontal velocity.

Can you give more detail