# Suppose A Car Moves At A Constant Speed Along A Hilly Road, Where Does The Road Exert The Greatest?

Contents

- 1 When a car moves at constant speed on a straight road?
- 2 What speed does a car need to have as it drives over a hill with radius 30 m in order to lose contact with the ground at the peak?
- 3 Does a car move at a constant speed?
- 4 Is a car turning at a constant speed accelerating?
- 5 What are the forces acting on a car moving at a constant speed?
- 6 What is constant speed?
- 7 What is tangential acceleration formula?
- 8 What is the centripetal force of a car going over a hill?
- 9 Do you feel heavier at the top or bottom of a hill?
- 10 Can u go around a curve with constant acceleration?
- 11 When a car round a corner at a constant speed its acceleration is zero?
- 12 What is the speed of a car traveling 400 m in 20 minutes?
- 13 What is the difference between positive and negative acceleration?
- 14 Does a car accelerate when it goes around a corner?
- 15 Why does a car accelerate as it rounds a corner?

## When a car moves at constant speed on a straight road?

The acceleration of a car that travels in a straight line at a constant speed of 100 km/h is zero. Average acceleration = (change in velocity)/(time it takes). Since the car’s change in velocity is zero, its acceleration is zero.

## What speed does a car need to have as it drives over a hill with radius 30 m in order to lose contact with the ground at the peak?

For the car to lose contact with the road, it must be traveling at a speed of 28 m/s or greater when it reaches the crest of the hill.

## Does a car move at a constant speed?

Therefore, a moving car does not change its direction and keeps its speed unless a force acts on it. Likewise, a car can turn a corner on a flat road if there is a frictional force which provides the necessary centripetal force for a circular motion.

## Is a car turning at a constant speed accelerating?

For example, if a car turns a corner at constant speed, it is accelerating because its direction is changing. The quicker you turn, the greater the acceleration. So there is an acceleration when velocity changes either in magnitude (an increase or decrease in speed) or in direction, or both.

## What are the forces acting on a car moving at a constant speed?

For example, when a car travels at a constant speed, the driving force from the engine is balanced by resistive forces such as air resistance and friction in the car’s moving parts. The resultant force on the car is zero. a runner at their top speed experiences the same air resistance as their thrust.

## What is constant speed?

Definition: When the speed of an object remains the same – it does not increase or decrease – we say it is moving at a constant speed.

## What is tangential acceleration formula?

The tangential acceleration = radius of the rotation * its angular acceleration. It is always measured in radian per second square. Its dimensional formula is [T^{–}^{2}]. When an object makes a circular motion, it experiences both tangential and centripetal acceleration.

## What is the centripetal force of a car going over a hill?

When a car is travelling on a flat road, the support force from the road is in the opposite direction to and equal in magnitude to the weight of the car. When the car goes over a hill the centripetal force which causes the car to travel in a circular path is the difference between the weight and the support force.

## Do you feel heavier at the top or bottom of a hill?

If you’re accelerating up a steep hill, the acceleration force and gravity are pulling in roughly the same direction, making you feel much heavier than normal. If you were to sit on a scale during a roller coaster ride, you would see your “weight” change from point to point on the track.

## Can u go around a curve with constant acceleration?

Can you go around a curve with constant acceleration? No, because the vector always points to the center of the circle and you are always changing the direction of that vector.

## When a car round a corner at a constant speed its acceleration is zero?

An object at rest will remain at rest, and a moving object will remain at a constant velocity unless unbalanced forces act on it. For every action, there is an equal and opposite reaction. The SI unit of acceleration is meters per second. When a car rounds a corner at a constant speed, its acceleration is zero.

## What is the speed of a car traveling 400 m in 20 minutes?

Answer: 400m in 20s by using the formula: average speed = distance traveled / elapsed time = 400m/20s = 20m/s.

## What is the difference between positive and negative acceleration?

An object which moves in the positive direction has a positive velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion (in this case, a negative acceleration).

## Does a car accelerate when it goes around a corner?

As a car goes around a corner, because its direction changes, the velocity must change. A change in velocity requires acceleration and it is centripetal force which causes this “centripetal” acceleration.

## Why does a car accelerate as it rounds a corner?

Explanation: An acceleration is necessary for an object to change direction. The car experiences a centripetal force as it turns the corner as a result of friction. This in turn causes a centripetal acceleration, which causes the direction of the velocity to change.