What is the average power delivered by the automobile engine?
alwayzvivi asked:
I need a walkthrough of the problem, not just the answer. thanks !
This entry was posted
on Saturday, March 6th, 2010 at 12:24 am and is filed under Physics.
You can follow any responses to this entry through the RSS 2.0 feed.
You can leave a response, or trackback from your own site.
I need a walkthrough of the problem, not just the answer. thanks !
3.A 1000 kg sports car accelerates from zero to 25 m/s in 7.50 s. What is the average power delivered by the automobile engine?
a) 27.9 hp b) 40.6 hp c) 55.9 hp d) 70.2 hp e) 82.4 hp (Recall 1hp = 746 W)
March 8th, 2010 at 2:38 pm
The engine has changed the kinetic energy of the car from zero to 1/2mV^2 in a time t. All that you can calculate with the info provided. Power is change of energy divided by the time it takes for it to change. The answer will be found in Watts so you need to covert watts to hps. Ivan A