Lily is practicing climbing a vertical pole on the playgroun...

Question

Lily is practicing climbing a vertical pole on the playground. When she climbs upward at a constant speed, she experiences a frictional force of . When she descends at a constant speed, the frictional force she experiences is . If Lily's weight is mg, which of the following statements is correct?

To analyze the situation, we need to consider the forces acting on Lily when she is climbing upward and when she is descending, both at constant speeds.

When Lily climbs upward at a constant speed:

The forces acting on her are:

Her weight acting downward.

The frictional force acting upward (opposing her motion).

Since she is climbing at a constant speed, the net force is zero:

When Lily descends at a constant speed:

The forces acting on her are:

Her weight acting downward.

The frictional force

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