# Physics

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I need help with this question...A skateboarder, starting from rest, rolls down a 12.0-m ramp. When she arrives at the bottom of the ramp her speed is 8.90 m/s. (a) Determine the magnitude of her acceleration, assumed to be constanIf the ramp is inclined at 21.5° with respect to the ground, what is the component of her acceleration that is parallel to the ground?

• Physics -

9a) Vfinal = sqrt(2aS) where S is the distance travelled.

Solve that for a, the acceleration down the ramp.

(b) a cos 21.5 is the acceleration component parallel to the ground.

• Physics -

Her component

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