Question

ME AJUDEM POR FAVOR!

Answer 1

$A)\\\\Q_0 = m \times v_0 = 4 \times 5 = 20 \ \text{kg \cdot m/s}\\\\B)\\\\Q_f = 4 \times 0 = 0 \ \text{kg \cdot m/s}\\C)\\\\|I_{fat}| = |\Delta Q| = |Q_f - Q_0| = 20 \ \text{N \cdot s}\\\\D)\\\\|I_{fat}| = |F_{fat}|\cdot \Delta t\\|F_{fat}| = \frac{20}{4} = 5 \ \text{N}\\\\E)\\\\F_{fat} = N \cdot \mu\\\mu = \frac{F_{fat}}{N} = \frac{5}{4 \times 10} = 0,125$