1. In the sport of curling, teams try to slide a 20kg stone as close as possible to the center of a target. They do this by first pushing the stone, releasing it, and then allowing it to slide to a stop
(or hit another stone). If the ice has a coefficient of friction of 0.02, what is the acceleration of
the stone as it is sliding (after it is released)? ( -0.196m/s2)
show work.

The correct answer is  "c".  it is "c" because melting is an endothermic change, and endothermic get's energy from surroundings. 

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.

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