Posted by Tally on .
How long will it take a 1000kg cat=r with a power output of 30,000W to go from rest to 20m/s?

physical science 101 
drwls,
Calculate the required kinetic energy increase. That equals power 8 time.
Solve for time.
That will give you an approximate answer. Power from a car engine does not remain constant during acceleration from a standing start.