Please teach me in physics mylotters...!!!

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this is all about curvilinear motion for fig.1 A spacecraft is orbiting the earth 1. Which path shows the spacecraft moving at a constant speed? Explain. 2. Suppose the engines are fired to make the spacecraft go faster. Which path illustrate it? for fig.2 A ball is being thrown in a horizontal direction off a cliff. 1.) Describe the motion of the ball. thank you so much!!! love you mylotters!