85.5 applications of Newton's law Exercise 2: in the figure, A is a 4.4 kg block and B is a 2.6 kg block. The coefficients of static and kinetic friction between a and the table are 0.18 and 0.15(a) Determine the minimum mass of the block C that must be placed on a to keep it from sliding.(b) Block C is suddenly lifted off A What is the acceleration of block a? 85.5 applications of Newtons law Exerscise 3: an ideal pendulum with a pear of mass m and an inflexible, massless thread of length L Keep the pendulum at horizontal initially, and then drop it from rest. when the angle between the thread and the horizontal is 0, find the speed of the pear and the tension in the thread13 Exercise 2: in the figure, A is a 4.4 kg block and B is a 2.6 kg block. The coefficients of static and kinetic friction between A and the table are 0.18 and 0.15. (a) Determine the minimum mass of the block C that must be placed on A to keep it from sliding. (b) Block C is suddenly lifted off A. What is the acceleration of block A? A B C §5.5 applications of Newton’s law §5.5 applications of Newton’s law O l θ Exerscise 3: an ideal pendulum with a pear of mass m and an inflexible, massless thread of length l. Keep the pendulum at horizontal initially, and then drop it from rest. When the angle between the thread and the horizontal is , find the speed of the pear and the tension in the thread. θ