A block of base 10 cm × 10 cm and height 15 cm is kept on an inclined plane. The…

Physics · JEE Advanced · NTA Exams — Laws of Motion

A block of base 10 cm × 10 cm and height 15 cm is kept on an inclined plane. The coefficient of friction between them is The inclination θ of this inclined plane from the horizontal plane is gradually increased from 0°. Then

1. at q = 30°, the block will start sliding down the plane
2. the block will remain at rest on the plane up to certain q and then it will topple
3. at q = 60°, the block will start sliding down the plane and continue to do so at higher angles
4. at q = 60°, the block will start sliding down the plane and on further increasing q, it will topple at certain q.