Question: A 50 N box has an applied force on it of 40 N that makes an angle of 300 with the horizontal. The box is

A 50 N box has an applied force on it of 40 N that makes an angle of 300 with the horizontal. The box is moving to the right at a constant speed in both cases. Student A says that friction force is same in both the cases as the resolved horizontal component of the force is equal to friction force. Explain why student A is wrong in justifying that the horizontal component of the force is equal to the friction force

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