A person pulls a 50. kg box pictured below with a force of 100. N.  The coefficient of kinetic friction is 0.15.  How much of the force acts in the direction of motion?How much energy is transferred (via working) by the person who pulls the box a distance of 10. m?
Is the box moving at constant speed? Explain how you know. What does this tell you about the kinetic energy Ek of the system?
How much energy is stored as internal energy due to friction in the pulling process over the 10.m?
What eventually happens to this energy?

We have no idea what the graph shows, or why it may be accurate,  because we can't see the graph.on a different subject, choice ' d ' is the only true statement among the choices.

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.

Give more info about the experiment