Which of these statements is true with respect to Newton's 2nd Law? A. Acceleration is inversely proportional to net force.
B. Acceleration is directly proportional to mass.
C. The three variables in Newton's 2nd Law are net force, velocity, and mass.
D. If the force is constant and the mass increases, the acceleration decreases.
If the force is constant and the mass increases, the acceleration also increases.

This is the answer: body 1 + engine 2

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.