Car of mass m travelling down a motorway

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In summary, the conversation discusses the motion of a car on a level road, with a mass of m, traveling at 100 km/hr and then slowing to 60 km/hr in ten seconds after the accelerator pedal is released. The questions posed are: (a) What is the average force acting on the car to slow it down? (b) How much power is required to maintain the car at 100 km/hr? (c) How much more energy is used in traveling at 105 km/hr compared to 100 km/hr and how much petrol would this correspond to?
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2. A car of mass m traveling down the motorway at 100 km/hr suddenly stops pressing the accelerator pedal. The result is that the car slows to 60 km/hr in ten seconds. Suppose all travel is along a level road.
(a) What is the average force acting on the car serving to slow it's motion?
(b) How much power is required to maintain the car at 100 km/hr given this external force?
(c) How much more energy is done in traveling at 105 km/hr than 100 km/hr? To how much petrol might this correspond?
 
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Related to Car of mass m travelling down a motorway

1. What is the relationship between the mass of a car and its speed while travelling down a motorway?

The mass of a car and its speed while travelling down a motorway have an inverse relationship. This means that as the mass of the car increases, its speed will decrease and vice versa.

2. How does the mass of a car affect its acceleration on a motorway?

The mass of a car has a direct effect on its acceleration on a motorway. The greater the mass of the car, the more force is needed to accelerate it, resulting in a slower acceleration.

3. Does the mass of a car have an impact on its fuel efficiency while driving on a motorway?

Yes, the mass of a car does have an impact on its fuel efficiency while driving on a motorway. A heavier car requires more energy to maintain its speed, resulting in lower fuel efficiency compared to a lighter car.

4. How does the mass of a car affect its braking distance on a motorway?

The mass of a car directly affects its braking distance on a motorway. A heavier car has more momentum and requires more force to be stopped, resulting in a longer braking distance compared to a lighter car.

5. Is there a limit to how heavy a car can be while travelling down a motorway?

Yes, there are regulations in place for the maximum weight a car can be while travelling down a motorway. This is to ensure the safety of the driver and other vehicles on the road. The maximum weight limit varies depending on the type of motorway and country regulations.

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