- #1
lewis198
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This was actually an old problem I got wrong.
) A skateboarder rolls down a semicircular ramp (half pipe) of radius 4.0m, starting from rest at the top of the ramp (figure 1). Assuming the surface to be frictionless, calculate his radial and tangential acceleration when he is 2.0m below the top of the ramp. What is the resultant acceleration vector (magnitude and direction, given as an angle to the horizontal) at this point?
I equated the radial acceleration to gcos(arccos(2/4)) and the tangential to gsin(arccos(2/4))
where have I gone wrong here? to me it seems right.
Homework Statement
) A skateboarder rolls down a semicircular ramp (half pipe) of radius 4.0m, starting from rest at the top of the ramp (figure 1). Assuming the surface to be frictionless, calculate his radial and tangential acceleration when he is 2.0m below the top of the ramp. What is the resultant acceleration vector (magnitude and direction, given as an angle to the horizontal) at this point?
Homework Equations
The Attempt at a Solution
I equated the radial acceleration to gcos(arccos(2/4)) and the tangential to gsin(arccos(2/4))
where have I gone wrong here? to me it seems right.