- #1
new90
- 90
- 9
- Homework Statement
- A uniform plank 1.5m long and weighting 3kg is pivotedat one end.The plank is held in equilibrium in a horizontal position by a weight and pulley arrangement.Find th e W needed to balance th plank.Neglect friction
- Relevant Equations
- no equation
I think that the W should be 3kg to be in equilibrium but in the book it said that id 3/√(2 I don't why