An object sits at rest on a ramp. As the angle of inclination of the ramp increases, the object suddenly begins to slide. Which of the following explanations best accounts for the object's movement? a. The coefficient of static friction has decreased sufficiently. b. The force of gravity acting on the object has increased sufficiently. c. The component of gravity along the ramp has increased sufficiently. d. The friction has decreased sufficiently while the normal force has remained unchanged. e. The normal force has increased sufficiently.

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13. An object sits at rest on a ramp. As the angle of inclination of the ramp increases, the object suddenly begins
to slide. Which of the following explanations best accounts for the object's movement?
a. The coefficient of static friction has decreased sufficiently.
b. The force of gravity acting on the object has increased sufficiently.
c. The component of gravity along the ramp has increased sufficiently.
d. The friction has decreased sufficiently while the normal force has remained unchanged.
e. The normal force has increased sufficiently.
Transcribed Image Text:13. An object sits at rest on a ramp. As the angle of inclination of the ramp increases, the object suddenly begins to slide. Which of the following explanations best accounts for the object's movement? a. The coefficient of static friction has decreased sufficiently. b. The force of gravity acting on the object has increased sufficiently. c. The component of gravity along the ramp has increased sufficiently. d. The friction has decreased sufficiently while the normal force has remained unchanged. e. The normal force has increased sufficiently.
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