Posted by **Anonymous** on Thursday, April 12, 2012 at 9:43am.

a 55kg skateboarder on a 3kg board starts coasting on level ground at 8 m/sec. Let k=3.2 kg/sec. About how far will the skater coast before reaching a complete stop?

- physics -
**drwls**, Thursday, April 12, 2012 at 10:39am
What does k represent? Air friction resistance that is proportional to velocity?

Write and solve the differential equation of motion, to get equations for X(t) and V(t). Find the t when V = 0. Use that t for the location.

The assumption that resistance is proportional to velocity may not lead to an accurate result. As velocity slows down, the frictional resistance goes to zero with that assumption.

## Answer This Question

## Related Questions

- physics - a 55kg skateboarder on a 3kg board starts coasting on level ground at ...
- Math - a 55 kg skateboarder on a 3 kg board starts coasting on level ground at 8...
- Physics - A diver jumps off of a diving board. She leaves the board with a ...
- Physics - a 55 kg skateboarder starts out with a speed of 1.8 m/s. he does +80 J...
- physics - if a car goes from 10 m/s to a full stop,then its change in velocity ...
- physics - if a car goes from 10 m/s to a full stop,then its change in velocity ...
- physics - A wheel is turning at a speed of 2.0 rev/sec and is allowed to coast ...
- physics - A 54.5-kg skateboarder starts out with a speed of 1.95 m/s. He does +...
- physics - A student starts from rest from his house and accelerates uniformly at...
- Integration - Intergrate ¡ì sec^3(x) dx could anybody please check this answer. ...

More Related Questions