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An object goes up an incline with a speed of 45 m/s. It travels 12m and...

An object goes up an incline with a speed of 45 m/s. It travels 12m and then comes to a stop. The friction force is 120 N and the object has a mass of 15 kg. What is the angle of the incline? Use energy techniques only.

Edit: could you explain why it's not possible to get an answer?

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