## Physics Free Fall Question

The feather and the water droplet are dropped in a vacuum. Sketch a velocity-time graph to show the motion on both objects.

### Physics Free Fall Solution

For linear motion, we know

v = v₀ + at

Assuming that both feather and water droplet are initially at rest, followed by a release, v₀ should be equal to zero (stationary), hence the equation is now:

v = at

In a vacuum, the air resistance is close to zero or negligible, hence the falling objects **will not approach the terminal velocity.** The only force acting on the falling feather and water droplet is **gravitational force**, represented by:

a = g = 9.81 m/s²

Therefore, the velocity profile should be a straight line through origin with a gradient of 9.81, where vi s linearly proportional to t as described by the equation below.

v = 9.81t

Ooo okay understood, tqsm!!