A2L Item 051
A rock sits on a hillside. The slope of the hillside is inclined to the horizontal at approximately 30°.
Which of the forces exerted on the rock is smallest in magnitude?
- Friction force due to the ground
- Gravitational force due to the Earth
- Normal force due to the ground
- The Friction, Gravitational and Normal force are equal in magnitude
- Cannot be determined
- None of the above
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This material is based upon work supported by the National Science Foundation under grant number ESI-9730438. The opinions, findings, conclusions or recommendations expressed herein are those of the authors and do not necessarily reflect the views of the National Science Foundation.
Assessing-to-Learn by William J. Gerace, William J. Leonard, Robert J. Dufresne, and Ian D. Beatty is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License.
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