Contact and non contact forces

Front

What are contact forces?

Back

Contact forces are forces that occur when two objects are physically touching each other. Examples include friction, tension, and normal force.

Front

What are non-contact forces?

Back

Non-contact forces are forces that act on an object without physical contact. Examples include gravitational force, magnetic force, and electrostatic force.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It always acts in the direction opposite to the movement.

Front

What keeps planets in orbit around the sun?

Back

Gravity is the force that keeps planets in orbit around the sun.

Front

How does surface roughness affect friction?

Back

The rougher the surface, the greater the friction. A rough surface increases the resistance to motion.

Front

What is the relationship between friction and motion?

Back

Friction always acts in the opposite direction to the motion of an object, slowing it down.

Front

What happens to friction on an icy road compared to a dry road?

Back

An icy road has less friction than a dry road, making it more slippery.

Front

What is normal force?

Back

Normal force is the support force exerted upon an object that is in contact with another stable object, acting perpendicular to the surface.

Front

What is gravitational force?

Back

Gravitational force is the attraction between two masses. It is what keeps objects grounded and causes planets to orbit.

Front

What is tension?

Back

Tension is the force transmitted through a string, rope, or cable when it is pulled tight by forces acting from opposite ends.