Question

Two blocks are stacked on top of each other on the floor. the friction coefficient is 0.2 between all contacting surfaces. Take this to be both the static and kinetic coefficient of friction. Then the horizontal 10N force is applied to the lower block. What is the horizontal component of the force exerted by the floor on the lower block?

Answer 1

Answer: 10 N

Explanation: Balances 10 N and satisfies the friction conditions since

U (N) = 0.2 x 90 N = 18N