Answer Happy

A horizontal force F (parallel to the ground) is applied on a block of mass 6.30 kg that is on an incline of angle 40.0", as shown in Fig. 2. The coefficient of static friction and the coefficient of kinetic friction between the block and the incline are 0,400 and 0.350, respectively. (a) If the magnitude of F is 50.0 N and the block is at rest, what are the magnitude and direction of the frictional force on the block? (b) If the magnitude of the force F is increased, what is its magnitude if the block is at the verge of moving up the incline? (c) If the magnitude of F is 120.N, what is the acceleration of the block? (d) If the magnitude of the force Fis decreased, what is its magnitude if the block is at the verge of moving down the incline? (e) What is the magnitude of F if the acceleration of the block is 2.00 m/s² down the incline? a = 40° Fig. 2 www