## naman.mittal.714 3 years ago a car accelerates on a horizontal road due to the force exerted by : (a) engine of car (b) driver of car (c) earth (D) road

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1. akash123

2. naman.mittal.714

how?

3. amishra

Have you framed the question correctly?

4. study01234

road its a frictional force

5. Yahoo!

There can be multiple answers for this question

6. Pallavi06

its due to combination of force exerted by engine of the car and reaction force exerted by road...

7. akash123

engine exerts force on the road not on the car..

8. Pallavi06

so u mean to say that reaction force wont count ?? but it should count ....

9. akash123

Reaction force exerted by what? yes..car is accelerating or moving by the reaction force exerted by the road on the car only..

10. akash123

basically its the engine that does all the work even though indirectly..the engine transmits power to the wheels through the drive line...now its the wheels that exerts force on the road and reaction force acts on the wheel and since the wheel is connected to the car, the whole system moves...

11. akash123

suppose engine is exerting force on the car...engine is also a part of the car...then by newton's 3rd law..car(excluding engine) will also exert force on the engine..just take an analogy|dw:1347165086979:dw|

12. akash123

this car(in the above figure) is without any engine..and magnet is hanging in front of the car..will the car move or accelerate?

13. akash123

suppose engine is exerting force on the car...engine is also a part of the car...then by newton's 3rd law..car(excluding engine) will also exert force on the engine...then net force on the car(with engine) is zero!!!|dw:1347165421811:dw|

14. Pallavi06

thanks a lot akash..