Question

A block of mass \( 5 \, \text{kg} \) is placed on a horizontal surface. The coefficient of friction between the block and the surface is \( 0.4 \). What is the force of friction acting on the block?

• A. \( 20 \, \text{N} \)
• B. \( 15 \, \text{N} \)
• C. \( 10 \, \text{N} \)
• D. \( 25 \, \text{N} \)

Hint:

Remember: The force of friction depends on both the coefficient of friction and the normal force, which is equal to the weight of the object when on a horizontal surface.