# Second Opinion Needed: Car Acceleration, Force & Rotation Questions

• phil555
In summary, the conversation discusses a car with a mass of 1000 kg accelerating from 0 to 80 km h–1 in 10 s and then maintaining a constant speed. Questions are asked about the acceleration, distance traveled, engine force, and rotational speed of the drive wheels. There is also mention of the conversation belonging in the introductory physics section.
phil555

## Homework Statement

Could I please have peoples opinions on the below?

1. A car has a mass of 1000 kg and travels from 0 to 80 km h–1 in 10 s. It
then keeps moving at 80 km h–1.
(a) What is the magnitude of the acceleration in the first 10 s?
(b) How far does it move in the first 10 s?
(c) What force does the engine of the car provide to achieve this
acceleration?
(d) If the two drive wheels of the car are 500 mm in diameter, what is
their rotational speed when the car is traveling at 80 km h–1?

## The Attempt at a Solution

#### Attachments

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This belongs in the introductory physics section.

Not the reply I as after LOL. But fair do's.

## 1. What is the relationship between car acceleration and force?

The relationship between car acceleration and force can be described by Newton's Second Law of Motion, which states that the force applied to an object is directly proportional to its mass and acceleration. This means that the greater the force applied to a car, the greater its acceleration will be.

## 2. How does the rotation of a car affect its acceleration?

The rotation of a car can affect its acceleration in several ways. For example, when a car makes a turn, the centrifugal force generated by the rotation of the car can cause it to accelerate in the direction of the turn. Additionally, the distribution of weight and the position of the car's center of mass can also impact its acceleration during rotation.

## 3. Can a car accelerate without applying force?

No, a car cannot accelerate without applying force. According to Newton's First Law of Motion, an object will remain at rest or in uniform motion unless acted upon by an external force. In the case of a car, the force is generated by the engine and transmitted to the wheels, causing the car to accelerate.

## 4. How does the shape of a car affect its acceleration?

The shape of a car can affect its acceleration in several ways. A sleek and aerodynamic design can reduce air resistance, allowing the car to accelerate more quickly. On the other hand, a bulky or boxy design can create more air resistance, making it more difficult for the car to accelerate.

## 5. What factors can impact a car's acceleration?

Several factors can impact a car's acceleration, including the force applied by the engine, the car's weight and distribution of weight, the shape and aerodynamics of the car, the condition of the wheels and tires, and external factors such as air resistance and road conditions. Additionally, mechanical issues or malfunctions can also affect a car's acceleration.

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