3. ,Car physics, part 1. A car has a drag coefficient Ca = 0.30, a frontal area of A = 1.9 m2 and a mass 1.2 tonnes. The density of air is 1.2 kg.m-3. i) What is the drag force when it is traveling at v = 110 kph in a straight line? Fdrag = N --- Hint: Retain accurate values until the final calculation, but remember significant figures. Car physics, part 1. A car has a drag coefficient Ca = 0.30, a frontal area of A = 1.9 m? and a mass 1.2 tonnes. The density of air is 1.2 kg.m -3 ii) What power (in kilowatts) is required to overcome the drag force at this speed? Pdrag = kW. Hint: Retain accurate values until the final calculation, but remember significant figures.
3. ,Car physics, part 1. A car has a drag coefficient Ca = 0.30, a frontal area of A = 1.9 m2 and a mass 1.2 tonnes. The density of air is 1.2 kg.m-3. i) What is the drag force when it is traveling at v = 110 kph in a straight line? Fdrag = N --- Hint: Retain accurate values until the final calculation, but remember significant figures. Car physics, part 1. A car has a drag coefficient Ca = 0.30, a frontal area of A = 1.9 m? and a mass 1.2 tonnes. The density of air is 1.2 kg.m -3 ii) What power (in kilowatts) is required to overcome the drag force at this speed? Pdrag = kW. Hint: Retain accurate values until the final calculation, but remember significant figures.
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Transcribed Image Text:Car physics, part 2.
A car has a drag coefficient Ca = 0.30, a frontal area of A = 1.9 m² and a mass 1.2 tonnes. It has a coefficient of rolling resistance, C, = 0.012. The rolling resistance is
a force F, = C,N, where N is the normal force.
I) What is F, when traveling at v = 110 kph on a horizontal road? F= N,
Hint: Retain accurate values until the final calculation, but remember significant figures.
Enter answer here
| Car physics, part 2.
Using the information from #664a above:
i) What power (in kilowatts) is required to overcome F, at this speed? P=
kw.
Hint: Retain accurate values until the final calculation, but remember significant figures.
, Car physics, part 3
A car has a drag coefficient Ca = 0.30, a frontal area of A = 1.9 m² , a mass 1.2 tonnes and a coefficient of rolling resistance, C,, = 0.012. It is travelling up a hill with a
slope of 1 in 20 at 110 kph. At what rate is it doing work against gravity (1.e. at what rate is it increasing its gravitational potential energy)?
Pg = kW.
(A 1:20 grade means that it rises 1 m for every 20 m travelled along the road: sin(0) = 1/20.)
%3D
Transcribed Image Text:3.
Car physics, part 1.
A car has a drag coefficient Ca = 0.30, a frontal area of A = 1.9 m? and a mass 1.2 tonnes. The density of air is 1.2 kg.m-3.
i)
What is the drag force when it is traveling at v = 110 kph in a straight line?
Fdrag =
N.
Hint: Retain accurate values until the final calculation, but remember significant figures.
Car physics, part 1.
A car has a drag coefficient Ca = 0.30, a frontal area of A = 1.9 m? and a mass 1.2 tonnes. The density of air is 1.2 kg.m-3.
ii) What power (in kilowatts) is required to overcome the drag force at this speed? Pårag =
kW.
Hint: Retain accurate values until the final calculation, but remember significant figures.
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