posted by michelle .
A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s.
(a) Determine the magnitude of her acceleration, assumed to be constant.
(b) If the ramp is inclined at 20.5° with respect to the ground, what is the component of her acceleration that is parallel to the ground?
please help! it would be much appreciated!!