Gravity is a non-contact force that acts at a distance between two objects with mass. Contact forces, such as friction and normal force, require physical contact between objects. Magnetic force, electrical force, and air resistance also act without physical contact between objects.
Gravity,Magnetism,Strong nuclear force,Weak nuclear force
Gravity Electromagnetic force Nuclear strong force Nuclear weak force Tension force Normal force Frictional force Applied force Spring force Buoyant force Magnetic force
A sound field, an electrical field, a magnetic field, and a gravity field would all be examples of non-contact forces. But though their effects are 'non-contact' their presence may nevertheless be easily detected.
Gravity, electrical force, magnetic force. These can act with direct touch. "False" forces which are dependent on the observer's motion, such as centrifugal force and g forces are also sometimes considered as non-contact There are also some nuclear forces, but they are not normally observed, and electrical and magnetic forces are really two sides of the same coin.
In one case there is a contact, in the other, there isn't. Well, at least that's what it looks like at a first glance - it seems that the "non-contact" forces such as electrical, magnetic or gravitational forces are actually mediated by the exchange of particles.
Gravity,Magnetism,Strong nuclear force,Weak nuclear force
Gravity Electromagnetic force Nuclear strong force Nuclear weak force Tension force Normal force Frictional force Applied force Spring force Buoyant force Magnetic force
- Gravity/weight - Air resistance/drag/friction - Centrapetal force
Gravity, electrical force, magnetic force. These can act with direct touch. "False" forces which are dependent on the observer's motion, such as centrifugal force and g forces are also sometimes considered as non-contact There are also some nuclear forces, but they are not normally observed, and electrical and magnetic forces are really two sides of the same coin.
A sound field, an electrical field, a magnetic field, and a gravity field would all be examples of non-contact forces. But though their effects are 'non-contact' their presence may nevertheless be easily detected.
Gravity, electrical force, magnetic force. These can act with direct touch. "False" forces which are dependent on the observer's motion, such as centrifugal force and g forces are also sometimes considered as non-contact There are also some nuclear forces, but they are not normally observed, and electrical and magnetic forces are really two sides of the same coin.
Contact Forces include: Frictional Force Tension Force Normal Force Air Resistance Force Applied Force Spring Force
Seismic data Resistance data Gravity data. Magnetic field data.
In one case there is a contact, in the other, there isn't. Well, at least that's what it looks like at a first glance - it seems that the "non-contact" forces such as electrical, magnetic or gravitational forces are actually mediated by the exchange of particles.
A magnetic potential energy is neither electrical nor gravitational potential energy. It is a form of energy stored in a magnetic field due to the relative positions of magnetic objects or the orientation of magnetic dipoles.
Mars has gravity, as do all planets, but not a magnetic field.
Contact and mechanical forces involve direct physical contact between objects, such as pushing or pulling. Gravitational and magnetic forces act at a distance without the need for physical contact, with gravity being a force between masses and magnetism a force between magnetic objects.