7. A vertical spring is fixed to one of its end and a massless plank fitted...

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7. A vertical spring is fixed to one of its end and a massless plank fitted to the other end. A block is released from a height has shown. Spring is in relaxed position. Then choose the correct statement. || www 8. (a) The maximum compression of the spring does not depend on h (b) The maximum kinetic energy of the block does not depend on h (c) The compression of the spring at maximum KE of the block does not depend on h (d) The maximum compression of the spring does not depend on k A person slowly pulls a bucket of water from a well of depth h. If the mass of uniform rope is m and that of the bucket full of water is M, then work done by the person is: (a) (M +)gh m M (b) (M+m)gh (c) (M +m)gh (d) +mgh 9. A particle is projected from point 'A' with velocity at an angle of 45 with the horizontal as shown in the figure. It strikes the inclined plane BC at right angle. The velocity of the particle just before collision with the incline is: uv2 2 A 45 B (a) 2 (b) 1/ 2 (c) (d) u 7. A vertical spring is fixed to one of its end and a massless plank fitted to the other end. A block is released from a height has shown. Spring is in relaxed position. Then choose the correct statement. || www 8. (a) The maximum compression of the spring does not depend on h (b) The maximum kinetic energy of the block does not depend on h (c) The compression of the spring at maximum KE of the block does not depend on h (d) The maximum compression of the spring does not depend on k A person slowly pulls a bucket of water from a well of depth h. If the mass of uniform rope is m and that of the bucket full of water is M, then work done by the person is: (a) (M +)gh m M (b) (M+m)gh (c) (M +m)gh (d) +mgh 9. A particle is projected from point 'A' with velocity at an angle of 45 with the horizontal as shown in the figure. It strikes the inclined plane BC at right angle. The velocity of the particle just before collision with the incline is: uv2 2 A 45 B (a) 2 (b) 1/ 2 (c) (d) u