Annie rides her snowboard down a hill sloped at 25 degrees

Question:

Annie rides her snowboard down a hill sloped at 25 degrees. The coefficient of kinetic friction between her and her skies is .15. If her mass is 55 kg, hw fast is she excelerating? Assuming she starts from rest and the equation is v=v+a*t, what is her velocity after 7 seconds?

How do you solve for the acceleration at an incline?

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