Question 6 10 pts The two blocks (M- 12 kg and m- 6.25 kg) shown in the figure a

Question

Question 6 10 pts The two blocks (M- 12 kg and m- 6.25 kg) shown in the figure are not attached to each other. The coefficient of static friction between the blocks is 0.485, but the surface beneath the larger block is frictionless. A horizontal force F is applied to the larger block. What is the minimum magnitude of the applied force (in Newtons) required to keep the smaller block from slipping down the larger block? im Frictionkes | Question 7 10 pts An initially stationary box of sand is to be pulled across a floor by means of a cable in which will break if the tension exceeds 747 N. The coefficient of static friction between the box and the floor is 0.477. The maximum amount of sand that can be pulled without breaking the cable depends on the angle at which the cable is pulled. Find the angle between the cable and horizontal that will allow you to pull the greatest amount of sand and enter the weight of the sand and box (in Newtons) in that situation. D Question 8 10 pts A student of weight 629 N rides a steadily rotating Ferris wheel (the student sits upright). At the highest point, the magnitude of the normal force on the student from the seat is 526 N. What is the magnitude of the normal force (in Newtons) on the student from the seat at the lowest point?

Explanation / Answer

W = weight of the student = 629 N

Fnmax = normal force at the maximum height = 526 N

Fc = centripetal force = ?

force equation is given as

Fc = W - Fnmax

Fc = 629 - 526

Fc = 103 N

Fnmin = normal force at lowest height = ?

force equation at the bottom is given as

Fc = Fnmin - W

103 = Fnmin - 629

Fnmin = 732 N

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