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Class XI Physics Mechanics of Fluids 2

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Question 1

A square gate of size 1m × 1m is hinged at its mid point. A fluid of density ρ fills the space to the left of the gate. The force F required to hold the gate stationary is -

Question 2

The tension in a string holding a solid block below the surface of a liquid (of density greater than that of solid) as shown in the figure is T₀ when the system is at rest. What will be the tension in the string if the system has upward acceleration a.

Question 3

A closed tank filled with water is mounted on a cart. The cart moves with an acceleration ‘a’ on a plane road. What is the difference in pressure of points B and A, shown in the figure?

Question 4

A closed cubical box is completely filled with water and is accelerated horizontally towards right with an acceleration a. The resultant normal force by the water on the top of the box-

Question 5

A cork is submerged in water by a spring attached to the bottom of a bowl. When the bowl is kept in an elevator moving with acceleration downwards, the length of spring–

Question 6

A vertical jet of water coming out of a nozzle with velocity 20 m/s supports a plate of mass M stationary at a height h = 15 m, as shown in the figure. If the rate of water flow is 1 litre per second, the mass of the plate is:
(Assume the collision to be inelastic)

Question 7

One cubic plate, having 15 cm side, floats on water surface. If surface tension of water is 60 dyne/cm. To lift this plate from water, Find the extra force required against weight.

Question 8

Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle of 30 º with each other. When suspended in a liquid of density 0.8 g cm^–3, the angle remains the same. If density of the material of the sphere is 1.6 g cm^–3, the dielectric constant of the liquid is

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Oct 13JEE & BITSAT