Question

A 0.5 kg book rests on a horizontal table. If the coefficient of static friction (μ_s​) is 0.4, what is the minimum horizontal force needed to make the book slide? (Use g = 9.8m/s²)

Options

• 1.96 N

• 1.225 N

• 4.90 N

• 0.20 N

Answer 1

1.96 N

Explanation:

This is the correct calculation of the limiting force: F_L​=μ_s​N = 0.4 × (0.5 × 9.8) = 1.96 N.