Contact and non contact forces

Front

What is a contact force?

Back

A contact force is a force that requires physical contact between two objects to occur.

Front

What is a non-contact force?

Back

A non-contact force is a force that acts on an object without physical contact, such as gravitational force, magnetic force, or electrostatic force.

Front

What is friction?

Back

Friction is a contact force that opposes the relative motion of two surfaces in contact.

Front

What is gravity?

Back

Gravity is a non-contact force that attracts two bodies towards each other, depending on their masses and the distance between them.

Front

What role does buoyancy play in water?

Back

Buoyancy is the upward force exerted by a fluid that opposes the weight of an object immersed in it, helping it to float.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, calculated as the mass of the object multiplied by the acceleration due to gravity (W = m * g).

Front

How does friction affect motion?

Back

Friction opposes motion, meaning it can slow down or stop moving objects.

Front

What is the direction of the force of friction?

Back

The force of friction always acts in the direction opposite to the motion of the object.

Front

Can you give an example of a non-contact force?

Back

An example of a non-contact force is gravitational force, which acts between two masses without them touching.

Front

What happens to an object in water if its weight is greater than the buoyant force?

Back

If an object's weight is greater than the buoyant force, it will sink.