Halliday, Resnick & Walker — Force and Motion–II: Problem 10_E

Figure 6.9 shows an initially stationary block of mass \( m \) on a floor. A force of magnitude \( 0.500mg \) is then applied at upward angle \( \theta = 20^\circ \). What is the magnitude of the acceleration of the block across the floor if the friction coefficients are (a) \( \mu_s = 0.600 \) and \( \mu_k = 0.500 \) and (b) \( \mu_s = 0.400 \) and \( \mu_k = 0.300 \)?