# Model Rocket

1. Aug 6, 2009

### wicked_vixen

A model rocket with a mass of 0.50 kg is fired vertically from the ground. Assume that it is streamlined enough that air resistance can be ignored. Suppose it ascends under the influence of a constant net force of 2.0 N acting in a vertical direction and travels for 6.0 s before its fuel is exhausted. Then it keeps moving as a particle-like object in free-fall as it continues upward, turns around, and falls back down.

What is the net force on the rocket when it continues upward as a free fall particle? as it turns around? When it is traveling back toward the ground?

Last edited: Aug 6, 2009
2. Aug 6, 2009

### tiny-tim

Welcome to PF!

Hi wicked_vixen! Welcome to PF!

What do you think?

What forces are acting on the rocket once the fuel stops?

Do they change, and if so, how?