Table of Contents
Why does the force of friction decrease?
When objects move through a fluid, such as air or water, the fluid exerts a frictional force on the moving object. The frictional force from a fluid is called a drag force. Friction drag force causes objects to slow down as they move through a fluid, such as air or water.
How do you lower the friction force?
Methods for Reduction friction:
- Make the surfaces little more smoother.
- Lubrication is another way to make a surface smoother.
- Make the object more streamlined.
- Reduce the Normal force acting between the surfaces in contact.
- Reduce the contact between the surfaces, so that less number of bonds will be formed.
How does friction affect a car?
Friction may slow the car down as it moves along the road, but it also is the force that enables the car to move forward at all. It is the friction force that keeps the tires from sliding on the road. So, it is the force of friction that makes a car accelerate forward and also decelerate to a stop.
What happens when friction is increased?
Friction causes the molecules on rubbing surfaces to move faster, so they have more energy. This gives them a higher temperature, and they feel warmer.
Is normal force equal to friction?
Friction is proportional to the force with which an object pushes against the surface you’re trying to slide it along. In other words, the normal force is the force pushing the two surfaces together, and the stronger the normal force, the stronger the force due to friction.
What are the main disadvantages of friction?
Disadvantages of friction:
- Friction produces a lot of heat in various parts of the machinery and this leads to wastage of energy as heat.
- Opposes motion, hence more energy is needed to overcome friction.
- Noise production in machines is irritating as well as leads to energy loss.
What are the causes and effects of friction?
Friction is a force that resists the relative motion between two objects or materials. The causes of this resistive force are molecular adhesion, surface roughness, and deformations. Adhesion is the molecular force resulting when two materials are brought into close contact with each other.