A 25-Kg Box Is Sliding Down an Ice-Covered Hill

question 55

Multiple Choice

A 25-kg box is sliding down an ice-covered hill. When it reaches point A, the box is moving at 11 m/s. Point A is at the bottom of a circular arc that has a radius R = 7.5 m. What is the magnitude of the normal force on the box at Point A?

• A)250 N
• B)280 N
• C)400 N
• D)650 N
• E)900 N

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