## What are the two factors that friction depends on?

The friction force depends on two factors:

• a) The materials that are in contact. The two materials and the nature of their surfaces.
• b) The force pushing the two surfaces together. Pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other.

## What are the two factors that affect gravity?

When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.

## What are the three factors that affect friction?

– Describe various factors that affect friction such as: The roughness of the surface, the mass of the object, and the area of contact.

## Why is physics important in our life?

Physics – the study of matter, energy and their interactions – is an international enterprise, which plays a key role in the future progress of humankind. Physics generates fundamental knowledge needed for the future technological advances that will continue to drive the economic engines of the world.

## Why do we learn physics?

The goal of physics is to understand how things work from first principles. Courses in physics reveal the mathematical beauty of the universe at scales ranging from subatomic to cosmological. Studying physics strengthens quantitative reasoning and problem solving skills that are valuable in areas beyond physics.

## Does speed affect friction?

sliding or kinetic friction between 2 surfaces that are moving relative to each other does not change with speed, but skin friction and drag is dependent on the speed, which you and others have noted: the faster the speed, the greater the ‘drag’.

## Does the force of friction depends on the area of contact?

Friction is a contact force when two surfaces interact. Notice that both of these friction formulas only depend on the coefficient of friction and the normal force. It does not depend the area of contact; it doesn’t depend on the sliding speed.

## What is no physics no life?

“No physics, no life” is an expression which signifies that we live in physical world, so we must have knowledge about it. It is the physics that deals with the physical phenomenon, and so we must have basic knowledge of Physics. However, knowledge of physics will help him in better understanding this physical world.

## Which depends on the frictional force?

(i) Nature of the surfaces in contact i.e. whether surface is rough or smooth. Friction depends on the smoothness or roughness of the two surfaces which are in contact. A rough surface produces greater friction as compared to a smooth surface.

## What are the three main effects of a force?

A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate.

## What are the factors affecting the force?

Force and Pressure | Short/Long Answer Questions Solution: Factors on which moment of force depends are: (i) The magnitude of the force applied. (ii) The distance of line of action of the force from the axis of rotation.

## Why does water have less friction?

Whether water acts as a lubricant or not depends on the nature of the two surfaces. For water to reduce friction, it must reduce the contact area between two surfaces by separating them and acting as a barrier. It can only do this if neither surface is absorptive, otherwise the water won’t remain between them.

## How does physics relate to life?

Physics extends well into your everyday life, describing the motion, forces and energy of ordinary experience. In actions such as walking, driving a car or using a phone, physics is at work. For everyday living, all the technologies you might take for granted exploit the rules of physics.

## Can we increase or decrease friction?

By making the surface rough ,friction force can be increased. when a ground or surface become slippery after rain or water splashing it is made rough by spreading sand to increase the friction. To decrease friction: (i) Friction between two surfaces can be decreased by using lubricants.

## What happens if there is no physics?

Without the understanding of physics today, many applications in physics such as electronics and mechanics would not exist today. We would be living without modern technology or instruments. A hammer, for example, would be well within our grasp, but things like the internet would be beyond us.

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