H2P-521
Couples
H2 Physics · JC 2 · Medium · Couples
A uniform 6.0 m plank of mass 30 kg is hinged at one end and supported 2.0 m from the hinge by a vertical cable. A painter of mass 50 kg stands at the free end. The plank remains horizontal. What is the extra tension in the cable due to the painter?
- 1.5 × 10 N
- 7.4 × 10 N
- 3.0 × 10 N
- 3.0 × 10 N
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