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CBSE Class 11 (Science) Mechanical Properties of Solids and Fluids — practice questions — page 6

Explore 257 free Mechanical Properties of Solids and Fluids questions in CBSE Class 11 (Science) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Mechanical Properties of Solids and Fluids questions and exercises with answers

Showing questions 151–180 of 257.

In a hydraulic lift a small force on a small piston lifts a car on a large piston. The force gain is the:Read the answer and worked solution →The upward force a fluid exerts on a submerged body is the:Read the answer and worked solution →Archimedes' principle says the upward force equals the weight of the:Read the answer and worked solution →A stone is denser than water, so in water it:Read the answer and worked solution →The path of a fluid particle in steady flow is a:Read the answer and worked solution →The equation of continuity, Av = constant, expresses conservation of:Read the answer and worked solution →Where a pipe narrows and streamlines crowd together, the fluid speed:Read the answer and worked solution →Above a limiting speed called the critical speed, flow becomes:Read the answer and worked solution →Water leaves a hole in an open tank at the speed of a freely falling body. This is:Read the answer and worked solution →Plaque narrows an artery, blood speeds up there and pressure drops. The artery may:Read the answer and worked solution →Honey needs a bigger force than oil to slide a plate at the same speed. Honey is more:Read the answer and worked solution →Surface tension is a property of:Read the answer and worked solution →A wet paint brush forms a fine tip when lifted from water. This is due to:Read the answer and worked solution →Catch the Bernoulli devicesRead the answer and worked solution →Pop the pressure unitsRead the answer and worked solution →Steer into the fluid laneRead the answer and worked solution →Slice the fluid wordsRead the answer and worked solution →At rest or in motionRead the answer and worked solution →Whose law is itRead the answer and worked solution →Type the numberRead the answer and worked solution →Fluids bingoRead the answer and worked solution →Robert Hooke found that a spring's elongation is proportional to the load. He presented his law in:Read the answer and worked solution →In the spring-ball model of a solid, the balls stand for:Read the answer and worked solution →Stress is restoring force per unit area, while strain is the:Read the answer and worked solution →The SI unit of stress is newton per square metre, also called the:Read the answer and worked solution →A stress that changes an object's shape by sliding faces sideways is possible only in:Read the answer and worked solution →The ratio of change in volume to original volume under fluid pressure is the:Read the answer and worked solution →Hooke's law is valid for most materials but is described as:Read the answer and worked solution →Point D on the stress-strain curve, the highest stress a metal can take, is its:Read the answer and worked solution →Aorta tissue has a huge elastic region but no clear:Read the answer and worked solution →

Worked practice questions

In a hydraulic lift a small force on a small piston lifts a car on a large piston. The force gain is the:

  1. Buoyant force gain
  2. Gauge pressure gain
  3. Surface tension gain
  4. Mechanical advantage
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Correct answer: D. Mechanical advantage

1. The same pressure acts on both pistons. 2. A bigger area gives a bigger force. 3. The factor of increase is the mechanical advantage. _Source: syllabus Physics Part II, Chapter 10, Mechanical Properties of Fluids._

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The upward force a fluid exerts on a submerged body is the:

  1. Buoyant force
  2. Viscous force
  3. Surface tension
  4. Gauge pressure
Show answer and solution

Correct answer: A. Buoyant force

1. Pressure is greater on the lower surface than the upper. 2. The net push is upward. 3. That upward force is the buoyant force. _Source: syllabus Physics Part II, Chapter 10, Mechanical Properties of Fluids._

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Archimedes' principle says the upward force equals the weight of the:

  1. Air above it
  2. Displaced fluid
  3. Submerged body
  4. Vessel itself
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Correct answer: B. Displaced fluid

1. The body pushes some fluid out of the way. 2. That fluid's weight is what the fluid pushes back with. 3. So the buoyant force equals the weight of displaced fluid. _Source: syllabus Physics Part II, Chapter 10, Mechanical Properties of Fluids._

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