A 2.0-kg block slides on a frictionless 25° inclined plane. A force of 4.6 N acting parallel to the incline and up the incline is applied to the block. What is the acceleration of the block?
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1.8 m/s2 up the incline
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2.3 m/s2 up the incline
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6.6 m/s2 down the incline
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1.8 m/s2 down the incline
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2.3 m/s2 down the incline