Posted by **michaela** on Thursday, April 22, 2010 at 8:11pm.

A 10,000 kg frieight car is rolling along a track at 3.0 m/s. Calculate the time needed for a force of 1000 N to stop the car.

- physics -
**bobpursley**, Thursday, April 22, 2010 at 8:12pm
force*time= mass*changeinvelocity

1000t=10,000*3

solve for t,in seconds

- physics -
**Damon**, Thursday, April 22, 2010 at 8:14pm
Force = change in momentum/change in time = ma

1000 = (10,000*3)/ change in time

change in time = 10*3 = 30 seconds

## Answer This Question

## Related Questions

- physics - A(n) 23000 kg freight car is rolling along a track at 2.8 m/s. ...
- physics, please help check - A rocket car is traveling on a linear horizontal ...
- Physics - A railroad freight car with a mass of 50,000 kg is rolling along a ...
- physics - A 1000 kg car in neutral gear slow from 15 m/s to a stop in 5.0 s due ...
- physics : different question - Rank the automobiles based on the magnitude of ...
- Physics HELP - A railroad car with a mass of 2000kg is rolling at a speed of 15m...
- Physics - Calculate the force needed to bring a 1100–kg car to rest from a speed...
- physics - Rank these automobiles based on the magnitude of the impulse needed to...
- Physics - Steel Phantom is a roller coaster in Pennsylvania that, like the ...
- physics - A car, mass - 1950 kg, accelerates at +2.33 m/s (squared). Find the ...

More Related Questions