A painter of mass 120.0 kg stands on a platform of mass 50.0 kg and pulls on two

Question

A painter of mass 120.0 kg stands on a platform of mass 50.0 kg and pulls on two ropes which hang over pulleys, as shown. He pulls each rope with a force of 50.0 N. Assuming a coordinate system where +y is up, calculate the y-component of the acceleration ay. ay can either be positive or negative depending on the direction of the acceleration.

A painter of mass 120.0 kg stands on a platform of mass 50.0 kg and pulls on two ropes which hang over pulleys, as shown. He pulls each rope with a force of 50.0 N. Assuming a coordinate system where +y is up, calculate the y-component of the acceleration ay. ay can either be positive or negative depending on the direction of the acceleration.

Explanation / Answer

50 + 50 - ( 50 + 120)g = (50 + 120)a

a   = - 9.21 m/s2

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