Question

A downward moving skydiver is falling with a constant speed, which is the correct fbd

Answer 1

When a skydiver is falling with a constant speed, it means that the net force acting on the skydiver is zero. The free body diagram is attached below

When a skydiver is falling with a constant speed, it means that the net force acting on the skydiver is zero. Here is the explanation:

1. Gravity (Weight) Downward
`(\(W\))`:

- This force is always present and acts vertically downward.

- It is equal to the product of the mass
`(\(m\))` and acceleration due to gravity
`(\(g\))`.

-
`\( W = m \cdot g \)`

2. Air Resistance (Drag) Upward
`(\(D\))`:

- As the skydiver falls at a constant speed, the air resistance force opposes the force of gravity.

- It acts vertically upward.

- At constant speed,
`\(D\)` is equal in magnitude to
`\(W\)` but opposite in direction.

3. Net Force (Zero):

- Since the skydiver is falling at a constant speed, the net force is zero.

- The forces of gravity and air resistance are balanced.

- The downward force
`(\(W\))` is equal to the upward force
`(\(D\))` at constant speed.

- The net force is zero, meaning there is no acceleration (constant speed).

- This scenario is often referred to as terminal velocity, where the force of gravity is balanced by the force of air resistance, resulting in a constant speed descent.