- #1
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In a long drive home through the moutains I noticed that my car will do a constant 100km/h in gear with the engine running but no gas pedal down a 6% slope.
100Km/h = 27.8 m/s, in a 6% downgrade that's 1.7 m/s vertically.
kerb weight=1420Kg , so with 2 people and some fuel = 1600kg
mgh = 1600 * 9.8 * 1.7 J/s = 26Kw = 35bhp
So presumably cruising on the flat freeway at 100km/h I am also using 35bhp?
So why does the smallest engine I can buy in this car need 175bHp?
100Km/h = 27.8 m/s, in a 6% downgrade that's 1.7 m/s vertically.
kerb weight=1420Kg , so with 2 people and some fuel = 1600kg
mgh = 1600 * 9.8 * 1.7 J/s = 26Kw = 35bhp
So presumably cruising on the flat freeway at 100km/h I am also using 35bhp?
So why does the smallest engine I can buy in this car need 175bHp?