physics
posted by anonymous .
A child pulls on a wagon handle at an angle 37° above the horizontal with a force of 45 N. If the wagon accelerates at 8.1 m/s2 horizontally, what is the mass of the wagon? Assume frictional forces are negligible.

first figure the horizontal force.
forceh=45*cos37
that has to equal mass*a
solve for mass.
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