Alligator Ladder Golf Course
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1. Identify what's going to rotate
2. where is it going to rotate (place an X on it)
3. Identify the forces
4. Draw an Extended Free Body Diagram
5. Write a Net Torque Equation
Let the mass of the alligator be m
Let the mass of the ladder be M
gravitational forces acting on them, Mg and mg acting vertically downwards.
These mg forces can be resolved into two components, ;
The ladder has a force, Mg acting on it at the center of mass of the ladder downwards causing an anticlockwise moment.
Force mg acting vertically downwards, causing anticlockwise moment.
is the normal reaction force given by the golf course vertically upwards, in the anticlockwise moment.
is the normal reaction force acting horizontally by the wall where the upper part of the ladder touches the wall causing a clockwise moment.
Answer:1) So if the system rotates, The ladder will rotate.
Answer: 2) The ladder will rotate about its center of mass, it's center of mass must be denoted by a X
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