Question

Which of the following are contact forces ?
A. Friction B. Gravitational force
C. Magnetic force D. Muscular force
A. A and B
B. B and C
C. A and D
D. B and D

Answer 1

Answer:

A and D is the right answer

Answer 2

C. A and D -- Friction and Muscular force

Explanation:

A contact force is a force which acts on an object when it comes physically in contact with it. The most familiar example of a contact force is friction, which comes into play when two objects rub against each other. A contact force is a force applied to a body by another body that is in contact with it. Friction and Muscular force are contact forces.