lorielder2929 lorielder2929
  • 22-03-2024
  • Physics
contestada

A 300-kg piano slides 4.0 m down a ramp inclined 25° above the horizontal. The coefficient of kinetic friction between the piano and the ramp is 0.1. A man pushes back on the piano with a force of...
a) 80 N
b) 120 N
c) 160 N
d) 200 N

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