Automotive Calculations

How much power is required to keep a car going 60 mph?

Measure how long it takes the car to slow from 60 mph to 55 mph "coasting" Kinetic energy (1/2 m v^2) converted to heat (energy consumed in "n" sec)

(1/2) (3720 lbm * ((60 mph)^2 - (55 mph)^2)) / (7 sec) ? hp
= 18.5728 hp

What is the efficiency of the engine if the car gets 30 mpg?

18.5728 hp; hcv_gasoline; 60 mph; 30 miles/gal ? %
= 20.3655 %
= 491.026 %

What is the flow rate of gas in the gas line?

60 mph; 30 mile/gal ? cc/sec
= 2.10301 cc/sec

Got a good calculation? Send it to us at webmaster@calchemy.com

[Calchemy Logo]