Forces For Science

A force is defined as a push or pull that can cause an object to start moving, stop moving, or change its shape. It is not related to a state of rest or motion, an energy field, or temperature changes.

Gravity is the force of attraction between objects with mass. It is responsible for keeping planets in orbit around the sun and objects grounded on Earth.

Magnets only attract objects that contain iron, cobalt, or nickel due to their magnetic properties.

Air friction is the force that resists the motion of an object as it moves through the air. It is generated by the interaction between the object and the air molecules that it has to displace in order to move forward.

Upthrust, also known as buoyancy, is the force that causes objects to float. It pushes you up when you are in the water, making it easier to stay afloat.

Tension in physics refers to the force exerted by a flexible object like a rope or spring when it is pulled tight. It is not related to emotional or psychological states, nor is it a force acting in the opposite direction to external forces or the pressure exerted by fluids in containers.

A non-contact force is a type of force that does not require direct physical contact to act on an object. It can include forces such as magnetic force, gravitational force, and electrostatic force.

A contact force is a type of force that can influence an object even without any physical contact, such as gravitational force.

Gravity is considered a Non-Contact force because it acts over a distance without the need for physical contact between objects. This force is responsible for the attraction between all objects with mass.

Magnetism is a non-contact force because it can exert its influence without directly touching the objects involved. Unlike contact forces, such as friction or tension, magnetism can act over a distance.

Friction is a Contact force because it occurs when two surfaces are in contact with each other and resists the relative motion between them.

Air Friction is a type of friction force that occurs when an object moves through the air, making it a contact force.

Mass refers to the amount of matter in an object, not its weight, volume, or color.

Weight is calculated by multiplying the mass of an object by the acceleration due to gravity. This is why the correct formula is Mass X Gravity = Weight.

Force is measured using a Newton Meter because it is specifically designed to measure force in units of newtons. Using any other type of meter would not provide an accurate measurement of force.

Friction always acts in the direction opposite to the direction of motion of the object.

When you are sky diving, the force of gravity acts downwards pulling you towards the earth, causing you to accelerate towards the ground. This downward force is what creates the sensation of free fall during sky diving.

Friction is not a force that helps objects move smoothly, attract objects towards each other, or cause objects to float in the air. It is actually a force that resists motion when two surfaces rub against each other.

Reducing friction can be achieved by using lubricants to create a slippery layer between surfaces or by minimizing the surface contact, which decreases the frictional force. Increasing surface contact, adding weight, or applying more force would actually increase friction instead of reducing it.

Permanent magnets are materials that retain their magnetism without the need for an external magnetic field. This distinguishes them from temporary magnets, electromagnets, and soft magnets which do not possess this property.

Temporary magnets are designed to be magnetized when in the presence of a magnetic field, but lose their magnetism once the magnetic field is removed.

The South Pole attracts towards the North Pole due to the magnetic field alignment in the Earth's core.

The force field responsible for making a compass needle point north is the magnetic force of the Earth, which aligns the needle with the Earth's magnetic field.

Forces can be described in various situations based on how they affect the motion of objects. The correct answer highlights the effects of forces applied to moving objects in different directions and their impact on speed and direction.