Final answer:
The forces on the ladder at the top and bottom can be determined using Newton's second law and the concept of equilibrium. At the top of the ladder, the forces acting are the person's weight and the normal force from the wall. At the bottom, the forces are the person's weight, the normal force from the ground, and the friction force.
Step-by-step explanation:
The forces on the ladder at the top and bottom can be determined using Newton's second law and the concept of equilibrium.
At the top of the ladder, the forces acting are the person's weight and the normal force from the wall.
At the bottom, the forces are the person's weight, the normal force from the ground, and the friction force.
Using the given values, the person's weight can be calculated by multiplying their mass by the acceleration due to gravity (70.0 kg * 9.8 m/s^2 = 686 N).
The normal force at the top is equal to the person's weight (686 N) since the ladder is in equilibrium.
At the bottom, the normal force is equal to the person's weight plus the weight of the ladder (686 N + 98 N = 784 N).