THRUST & PRESSURE 10 GRAVITATION Class 9th Science (Physics) (Practice Sheet) 1 What is the upward force exerted by a fluid on an object immersed in it called? A. Thrust B. Torque C. Gravity D. Buoyant Force 2 Which principle states that the buoyant force exerted on an object submerged in a fluid is equal to the weight of the fluid displaced by the object? A. Archimedes' Principle B. Pascal's Principle C. Bernoulli's Principle D. Newton's Third Law 3 If an object is denser than the fluid it is immersed in, it will: A. Sink B. Float C. Remain suspended D. Change color 4 The pressure exerted by a fluid at a given depth is: A. Proportional to the volume of the fluid B. Independent of the density of the fluid C. Independent of the depth D. Proportional to the area of the surface 5 Why does an object weigh less when immersed in a fluid compared to its weight in air? A. The buoyant force reduces the object's weight B. The fluid exerts a smaller pressure on the object C. The object's density decreases in the fluid D. The gravitational force is weaker in a fluid 6 What is center of Buoyancy? 7 Where is Buoyant Force and Buoyancy? 8 What Causes Buoyancy? 9 What is the relationship between Buoyant Force and Density? 10 Calculate the buoyant force on a can of beans weighing about 0.5kgs dropped in the lake at a depth of 20 meters. The density of lake water is 1000 kg/m3 and the Volume of that sealed can of beans is 5 × 10-3m3 . Page 1 Email: Phone No: Website:
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