What is a push or pull that one body exerts on another?

Spread the love

a force is a push or pull that one body exerts on another.

Table of Contents show

What is sticking points between two surfaces that cause friction?

This force is called adhesion. Trying to slide one object across the other requires breaking these adhesive bonds. Adhesion is the essence of friction.

What is the tendency of an object to resist a change in motion?

First Law/Inertia: The tendency of an object to resist changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has.

What is related to the amount of force needed to change an object’s motion?

The motion of an object is determined by the sum of the forces acting on it; if the total force on the object is not zero, its motion will change. The greater the mass of the object, the greater the force needed to achieve the same change in motion. For any given object, a larger force causes a larger change in motion.

Does the coefficient of kinetic friction depend on the weight of the block?

Also, the coefficient of friction doesn’t depend on the mass of the object.

How can we reduce frictional force if it is not required explain with an example?

By polishing the surface, as polishing makes the surface smooth and friction can be reduced. Using lubricants such as oil or grease can reduce the friction between the surfaces. When objects are rolled over the surface, the friction between the rolled object and surface can be reduced by using ball bearings.

Which is an example of an object that can produce rolling friction when rolls over a surface?

Any ball or wheel has rolling friction when rolled on a surface. Some examples of items that have rolling friction include: truck tires. ball bearings.

Which of the following changes when an unbalanced force acts on an object?

An unbalanced force acting on an object results in the object’s motion changing. The object may change its speed (speed up or slow down), or it may change its direction. Friction is a force that resists the motion or the tendency toward motion between two objects in contact with each other.

When two forces on the same object are equal and opposite these forces are called forces?

Equal forces acting in opposite directions are called balanced forces.

What is a force that opposes motion hint It occurs when things slide or roll over each other?

Friction. Friction is a force that opposes relative motion between surfaces in contact. One of the simpler characteristics of friction is that it is parallel to the contact surface between surfaces and always in a direction that opposes motion or attempted motion of the systems relative to each other.

How would you relate the mass to the object’s acceleration if constant force is applied?

It is summarized by the equation: Force (N) = mass (kg) × acceleration (m/s²). Thus, an object of constant mass accelerates in proportion to the force applied. If the same force is applied to two objects of differ- ent mass, the heavier object has less acceleration than the lighter object (Figure 1).

How does the force on a moving object affects its acceleration when the mass remains the same?

The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.

What is the term used to describe a force which tries to pull two objects toward each other?

Gravity is a force which tries to pull two objects toward each other.

When the mass of the block is increased does the force of kinetic friction increase Why?

Friction increases with mass because friction depends on the normal force, which is related to the weight of an object, which depends on mass.

How do you find the coefficient of static friction with mass and force?

Mathematically, μ = F/N, where F is the frictional force and N is the normal force. Because both F and N are measured in units of force (such as newtons or pounds), the coefficient of friction is dimensionless. The coefficient of friction has different values for static friction and kinetic friction.

How do you find the coefficient of static friction on a flat surface?

Incorporating the physics of friction with the geometry of the inclined plane gives a simple formula for the coefficient of static friction: μ = tan(θ), where μ is the coefficient of friction and θ is the angle.

How does oiling and using ball bearings help reduce friction Class 8?

Ball bearings reduce friction by using smooth balls lubricated with oil or grease that freely roll between a smooth inner and outer surface. The main concept of the ball bearing is that objects that roll past each other produce less friction than if the objects were sliding against each other.

Why do we use oil on hinges of the rusty windows?

Lubrication always decreases friction between two surfaces. Hence putting oil will decrease friction.

How do lubricants increase the efficiency of objects explain your answer with Example Class 8?

1) Lubrication – It helps in reducing roughness, which decreases friction. 2) Ball Bearings – Since rolling friction is less than sliding friction, ball bearings help in maintaining minimal surface of contact between two surfaces in motion. 3) Polishing – Smooth surfaces or bearings work better than the rough ones.

Which of the following friction methods produce less friction * A static friction b rolling friction C sliding friction D composite friction?

Ans. Rolling friction produces the least friction.

How can you say that rolling reduces friction Give 2 examples where sliding friction is replaced by rolling friction?

Answer: In circular object sliding friction is usually replaced by rolling friction because that helps in movement of the object. Explanation: for example in the tyres of a car the sliding friction is replaced by rolling friction. The sliding friction acts only when brake is applied to the car.

What is rolling friction write laws of rolling friction define coefficient of rolling friction?

Laws of Rolling Friction Rolling friction is expressed as a product of load and constant to the fractional power. F = kLn. Rolling friction force is directly proportional to load and inversely proportional to the radius of curvature. F = μ × W r.

When the forces exerted on the object are of equal size but in opposite direction then the forces are known as?

Newton s Third Law When one object exerts a force on another object, the second object exerts a force on the first object that is equal in magnitude, but opposite in direction; for every action, there is an equal, but opposite reaction; called the law of action-reaction.

When forces are balanced pulling in opposite directions with equal size we say they are in?

The floor exerts an upward force. Since these two forces are of equal magnitude and in opposite directions, they balance each other. The person is at equilibrium.

What do you understand by the term balanced force and unbalanced forces explain with example?

Answer: a) When the forces acting on a body is zero, the forces are called balanced force. Pressing of a balloon between both the hands is an example of balanced force. When the forces acting on a body is not zero, the forces are called unbalanced force.

Do NOT follow this link or you will be banned from the site!