A Rectangular Block Is Moving Along a Frictionless Path When

question 11

Multiple Choice

A rectangular block is moving along a frictionless path when it encounters the circular loop as shown.The block passes points 1,2,3,4,1 before returning to the horizontal track.At point 3:

• A)its mechanical energy is a minimum
• B)the forces on it are balanced
• C)it is not accelerating
• D)its speed is a minimum
• E)it experiences a net upward force

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