Final answer:
Contact forces, such as friction, normal force, tension, spring, drag, and thrust, are examples of forces that occur between systems that are in direct contact with each other.
Step-by-step explanation:
Friction, normal force, tension, spring, drag, and thrust are all examples of contact forces. Contact forces occur between systems that are in direct contact with each other.
Friction is a contact force that opposes the motion or attempted motion between two systems. Normal force is a contact force that is exerted on an object in response to its weight or an external force. Tension is a contact force that is exerted when a string, rope, or cable is pulled.
Spring force is a contact force that is exerted by a stretched or compressed spring. Drag force is a contact force that opposes the motion of an object through a fluid. And thrust is a contact force that propels an object forward.