# Friction and accelerarion please check my work.

• williamx11373
In summary, friction is a force that opposes motion between two surfaces in contact due to the roughness of the surfaces and the interlocking of molecules. It can decrease acceleration by acting in the opposite direction of motion and is affected by surface roughness, the force pressing surfaces together, and surface material. There is a difference between static and kinetic friction, with static friction keeping an object at rest and kinetic friction opposing the motion of a moving object. Friction can be reduced by using lubricants, smoother surfaces, less force, or using wheels or rollers instead of sliding surfaces.
williamx11373
Friction and accelerarion...please check my work.

a horizontal force of 200 Newtons is applied to a 55 kg cart across a 10 meter surface. If the cart accelerates at 2 meters/second squared, then what is the work done by the force of friction as it acts to retard the motion of the cart ??

Work= FX
work= maX

55 kg x 2 x 10 = 1100 - 200 N = 900 Joules ??

is this correct ?

If there would have been no friction, what will be the acceleration of the cart when 200 N force is applied?
What is the actual acceleration?
What is the retardation due to frictional force?

Yes, your calculation is correct. The work done by the force of friction is 900 Joules. This means that 900 Joules of energy is converted into heat due to the friction between the cart and the surface. This is an important concept in physics as it helps us understand how forces and motion interact in real-world situations. Keep up the good work!

## 1. What is friction?

Friction is a force that opposes motion between two surfaces in contact. It is caused by the roughness of the surfaces and the interlocking of molecules between them.

## 2. How does friction affect acceleration?

Friction can decrease the acceleration of an object by acting in the opposite direction of its motion. This is because it requires extra force to overcome the friction and continue moving at a constant speed.

## 3. What factors affect the amount of friction between two surfaces?

The amount of friction between two surfaces is affected by the roughness of the surfaces, the force pressing the surfaces together, and the type of material the surfaces are made of.

## 4. What is the difference between static and kinetic friction?

Static friction is the force that keeps an object at rest from moving, while kinetic friction is the force that opposes the motion of an object that is already moving.

## 5. How can friction be reduced?

Friction can be reduced by using lubricants, making surfaces smoother, or reducing the force pressing the surfaces together. It can also be minimized by using wheels or rollers instead of sliding surfaces.

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