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The force F = M (mass) * a (acceleration) (Newton's second law of motion)

In metric units:

Force: N (= mass*g) where g is approx equal 9.81 m/s^2 (depends on location, Sweden=9.819 m/s^2)

mass: kg

acc: m/s^s

The force must be greater than the resistance. The resistance increases with increased speed! To power a car at 40MPH requires xHP, at 80MPH it requires 8xHP!

wind resistance (non linear!) (aka Cd)

rolling resistance (constant) (aka Cr)

etc

If you find this interesting have a look at:

http://craig.backfire.ca/pages/autos/horsepower

http://en.wikipedia.org/wiki/Newton%27s_laws_of_motion

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15y ago
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13y ago

The car depends completely on the engine. The engine in the car does the work

& hence the car functions(move). The motion of the car is due to the motion of the wheels. For this motion the necessary force is the frictional force which is provided by the rough surface of the tyre & the road. Therefore a car can accelerate on a road due to the frictional force.

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14y ago

force of friction .. by uzair atif ID- uzairatif2000@Yahoo.com

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13y ago

The wheels pushing against the road (the force of friction)

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Q: A car accelerates along a road which force actually moves the car?
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