Question

a force that opposes motion between two touching surfaces is called:
choose one option
a friction
b acceleration
c speed
d direction

Explanation:

To solve this, we analyze each option:

• Option A: Friction is defined as the force that opposes motion between two touching surfaces.
• Option B: Acceleration is the rate of change of velocity, not a force opposing motion.
• Option C: Speed is the rate of motion, not a force.
• Option D: Direction is the path of motion, not a force.

So the correct option is A as it matches the definition of friction.

Answer:

A. friction