B. An 18kg sack of apples is lying on the ground. The coefficients of friction between...
B. An 18kg sack of apples is lying on the ground. The coefficients of friction between the ground and the bag are mu_s = 0.6 and mu_k=0.4. An old lady grabs the bag of apples and begins pulling it diagonally upwards with a force of 100N, at an angle 60 degrees above the horizontal i. Draw a regular diagram (drawing) and a System Schema for the situation ii. Draw a pure FBD and a component FBD of the sack of apples. iii. Compute the normal force between the sack and the ground. Hint: set up an NII equation for the y components. iv. Compute the maximum force of static friction on the bag of apples. V. Show that the woman will not succeed in moving the bag. Hint: set up an NII equation for the y components. vi. The woman now pulls with a force of 140 N. vii. Compute the normal force between the sack and the ground. viii. Show that the woman will succeed in moving the bag. ix. Compute the force of kinetic friction. X Compute the acceleration of the bag