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A projectile have initial velocity 20 m/s making an angle of 30° with vertical. When it makes 45° with vertical in upward journey then speed becomes
A hemispherical bowl of radius 10 m rotates about its vertical axis with an angular velocity 1.4 rad/s. A point particle of mass 10-2 kg placed on the smooth inner surface of the bowl, also rotates with the same speed. The particle is at a height h from the bottom of the bowl. Find the height of the particle.
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