9. A block of mass m 10kg is pulled up at an angle of 600 incline as shown in Figure below with a force of 80N. (Take: Cos 60° = Sin30º = 0.5, Cos 30° = Sin 60⁰ = 0.9) b. Find the acceleration of the block if the incline is frictionless. Find the acceleration of the block if the coefficient of kinetic friction is 0.2