This is extra credit, and the test has passed (no one got it), the prof said he'll still take efforts on it so here is my attempt.(adsbygoogle = window.adsbygoogle || []).push({});

A rocket sled is going down a test track at 180 km/hr (calculated to 50 m/s). It drops a snorkel into a trough of water. This diverts 30 kg/s of water vertically. The sled has mass of 500kg (including the snorkel and water in it).

The question is how far will the sled travel once it drops the snorkel.

I know I need to integrate from 50 to 0... but beyond that I don't know what vars to integrate in order to get something to plug into kinematic equations.....

negate fluid+track+air friction.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Need help picking vars to integrate on a neg-acceleration prob

Can you offer guidance or do you also need help?

**Physics Forums | Science Articles, Homework Help, Discussion**