In a skate park, there are ramps. The ramps are quarter circles. if a biker goes up the ramp to the top of the ramp, if he isn't going fast enough he will just roll back down, however if he is going fast enough he will keep going up. Basically his velocity out numbers the gravity pulling him...
basically a biking moving on a perfectly circular ramp or "arc". Like the ones you see in skate parks. How would you calculate the velocity required at the top of the ramp (or if it were a full circle/loop the side) so that the bike would keep moving up ( go air bourne) instead of falling to the...
I don't have a specific question, but was wondering how I would go about solving something like this:
How would you calculate the minimum velocity that a bike, for example, would require to become airbourne off a circular ramp, if you are given say the radius of the ramp. Would you need more...
okay if I do it like that, I get answer for power output of 12800, but i still receive the wrong answer when i do 12800/(12800*6 + 75000) * 100% = 51%. The answer should be 71% for efficiency.
A 1200kg car goes a distance of 12 meters on a road, going from 4m/s to 18 m/s in 6 seconds. If 75,000J of energy is used as heat energy, calculate power in/out and efficiency.
I believe I found the correct power output, by doing (.5)(1200)(14^2)/6 = 19600W, but I don't know how to find...