posted by help .
The engines of a 1.20 x 10^5 N rocket exert an upward thrust of 2.00 x 10^5 N for 1.50 minutes upon lift off.
What is the impulse exerted on the rocket?
What is the velocity of the rocket at the end of the 1.50 minute period?
physics - bobpursley, Thursday, February 3, 2011 at 8:18pm
physics - help, Thursday, February 3, 2011 at 9:09pm
I don't understand where the 90 comes from
1.5 minutes is 90 seconds, last time I checked.