# Acceleration and friction force

• moomoocow
In summary, acceleration is the rate at which an object's velocity changes over time and is measured in units of distance over time squared. It can be calculated by dividing the change in velocity by the time interval. Factors such as net force, mass, and friction force can affect acceleration. Friction force is a force that opposes an object's motion and can reduce or stop its acceleration.
moomoocow
hi!
if i were to push a carton, and the friction force was 200 Newtons..
how much force would i have to exert so the box is accelerating at 2m/s/s?
i don't know how to calculate it because the mass of the carton is not given..anysuggestions?

Perhaps they want an algebraic answer. I would call the mass x and derive a formula.

Hello there!

To calculate the force needed to accelerate the carton at 2m/s/s, we need to use Newton's Second Law of Motion, which states that force equals mass multiplied by acceleration (F=ma). However, as you mentioned, we do not have the mass of the carton. In this case, we can use the formula F=μN, where μ is the coefficient of friction and N is the normal force acting on the carton.

To find the normal force, we can use the formula N=mg, where m is the mass of the carton and g is the acceleration due to gravity (9.8m/s/s). We can assume that the carton is on a flat surface, so the normal force would be equal to the weight of the carton.

Once we have the normal force, we can plug it into the first formula (F=μN) to find the force needed to overcome the friction force. Then, we can use Newton's Second Law (F=ma) to calculate the force needed to accelerate the carton at 2m/s/s.

I hope this helps! Remember, it is always important to consider the mass and weight of objects when calculating forces and accelerations.

## What is acceleration?

Acceleration is the rate at which an object's velocity changes over time. It is a vector quantity, meaning it has both magnitude and direction. It is measured in units of distance over time squared (e.g. meters per second squared).

## How is acceleration calculated?

Acceleration can be calculated by dividing the change in an object's velocity by the time it took to change. This can be represented as the equation a = (vf - vi)/t, where a is acceleration, vf is final velocity, vi is initial velocity, and t is the time interval.

## What factors affect acceleration?

Acceleration can be affected by several factors, including the net force acting on an object, the mass of the object, and the presence of any external forces such as friction. In general, the greater the net force, the greater the acceleration, and the greater the mass, the smaller the acceleration.

## What is friction force?

Friction force is a force that opposes the motion of an object as it moves along a surface. It is caused by the microscopic interactions between the surfaces of the object and the surface it is moving on. Friction force can be either static (when the object is not moving) or kinetic (when the object is in motion).

## How does friction force affect acceleration?

Friction force acts in the opposite direction of an object's motion, so it can reduce or even stop an object's acceleration. The amount of friction force depends on the nature of the surfaces in contact and the normal force pushing the surfaces together. In the absence of friction force, an object would continue to accelerate at a constant rate.

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