A toy car rolls at a constant speed down a straight inclined track. When the car reaches the flat surface at the base of the inclined track, the speed of the car decreases.
Which statement best explains why the speed of the car decreases when it reaches the flat
surface?
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A. The force of gravity acting on the car increases.
B. The force of gravity on the car decreases.
C. The forces influencing the car are not balanced.
D. The forces influencing the car are balanced.

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If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant