Comments

• what is the piano's acceleration? a = F/m which are the forces that act on the piano. B, E, G, A is not a force C is not a force D doesn't act on piano F doesn't act on piano H doesn't act on piano

  in chadwich is pushing a piano across a level floor....? Comment by sojsail June 2021
• a) Because the velocity is constant, the acceleration is zero. Because there is no acceleration, the net force is zero. The net force is the vector sum Fnet = 0 = Fhorizontal + friction So Fhorizontal = -Ffriction So they are equal and opposite. …

  in How do I do this physics problem? Comment by sojsail May 2021
• a) Because the velocity is constant, the acceleration is zero. Because there is no acceleration, the net force is zero. The net force is the vector sum Fnet = 0 = Fhorizontal + friction So Fhorizontal = -Ffriction So they are equal and opposite. …

  in How do I do this physics problem? Comment by sojsail May 2021
• The car moved up maybe 1 foot and therefore gained gravitational potential energy. You did several (30?) strokes on the handle and each stroke might have been 1 foot. If you calculated the car's gravitational energy and the work you did with all…

  in How do hydraulics not "create energy"? Comment by sojsail May 2021
• The car moved up maybe 1 foot and therefore gained gravitational potential energy. You did several (30?) strokes on the handle and each stroke might have been 1 foot. If you calculated the car's gravitational energy and the work you did with all…

  in How do hydraulics not "create energy"? Comment by sojsail May 2021
• a) Because the velocity is constant, the acceleration is zero. Because there is no acceleration, the net force is zero. The net force is the vector sum Fnet = 0 = Fhorizontal + friction So Fhorizontal = -Ffriction So they are equal and opposite. …

  in How do I do this physics problem? Comment by sojsail May 2021
• a) Because the velocity is constant, the acceleration is zero. Because there is no acceleration, the net force is zero. The net force is the vector sum Fnet = 0 = Fhorizontal + friction So Fhorizontal = -Ffriction So they are equal and opposite. …

  in How do I do this physics problem? Comment by sojsail May 2021