Question

which of the following is a type of contact force?

a friction
b gravity
c electrical
d magnetism

Explanation:

Define contact and non-contact forces

Contact forces require physical touch between interacting objects, whereas non-contact forces act over a distance through a field.

Analyze the given options

• Friction: Occurs when two surfaces slide or attempt to slide across each other, requiring direct physical contact.
• Gravity: An attractive force acting over a distance between masses without requiring physical contact.
• Electrical: A force between charged particles that acts through an electric field without requiring physical contact.
• Magnetism: A force between magnetic poles or moving charges acting through a magnetic field without requiring physical contact.

Identify the correct option

Friction is the only force listed that requires physical contact between surfaces.

Answer:

• (A) friction (Correct answer)
• (B) gravity
• (C) electrical
• (D) magnetism