H2P-77
Free-body diagrams and vector triangles
H2 Physics · JC 1 · Hard · Free-body diagrams and vector triangles
A 900 N crate rests on a horizontal floor. The maximum static friction between the crate and the floor is 270 N. The crate is pulled by a rope attached to a knot. From the knot, one rope goes horizontally to the crate, and another rope goes up to a hook in the wall at above the horizontal. A third rope hangs vertically from the knot, supporting a load of weight . What is the minimum value of needed to start moving the crate?
- 2.26 × 10 N
- 2.70 × 10 N
- 1.80 × 10 N
- 3.52 × 10 N
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