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NPCC Engineer Static Equilibrium and Elasticity — practice questions

Explore 30 free Static Equilibrium and Elasticity questions in NPCC Engineer Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Static Equilibrium and Elasticity questions and exercises with answers

Showing questions 1–30 of 30.

A rigid body at rest in the chosen frame of reference is said to be in:Read the answer and worked solution →A body at rest for one observer may be moving steadily for another because motion is:Read the answer and worked solution →The first condition of equilibrium requires that the net external force be:Read the answer and worked solution →The second condition of equilibrium requires that the net external torque be:Read the answer and worked solution →Unlike the force condition, the torque condition depends on the choice of the:Read the answer and worked solution →In a free body diagram, the weight vector is attached at the body's:Read the answer and worked solution →In a uniform gravitational field, the centre of gravity is identical to the:Read the answer and worked solution →A truck tips over when its centre of gravity moves:Read the answer and worked solution →A racing car is hard to tip over mainly because it has a:Read the answer and worked solution →The torque produced by the weight of a body is called:Read the answer and worked solution →About an axis through the centre of mass, the gravitational torque is:Read the answer and worked solution →When solving a statics problem, the position of the pivot may be:Read the answer and worked solution →A horizontal beam on a fulcrum with masses on both sides forms a:Read the answer and worked solution →A torque balance can be used to measure an unknown:Read the answer and worked solution →In the forearm example, the torque of the force acting at the elbow is zero because it acts at the:Read the answer and worked solution →The quantity describing the magnitude of the forces that cause deformation is:Read the answer and worked solution →Stress is generally defined as force per unit:Read the answer and worked solution →The quantity describing how much an object deforms under stress is:Read the answer and worked solution →Strain has no physical unit, so the elastic modulus carries the same unit as:Read the answer and worked solution →A material with a very large elastic modulus deforms under a given stress by:Read the answer and worked solution →The elastic modulus that applies to tensile or compressive stress is called:Read the answer and worked solution →The elastic modulus that applies to bulk stress, acting all around an object, is the:Read the answer and worked solution →Catch the equilibrium termsRead the answer and worked solution →Pop the elastic moduliRead the answer and worked solution →Run the statics gatesRead the answer and worked solution →Slice the mechanics termsRead the answer and worked solution →Force or torqueRead the answer and worked solution →Sort the statics ideasRead the answer and worked solution →Type the numberRead the answer and worked solution →Statics bingoRead the answer and worked solution →

Worked practice questions

A rigid body at rest in the chosen frame of reference is said to be in:

  1. Static equilibrium
  2. Steady equilibrium
  3. Stable equilibrium
  4. Simple equilibrium
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Correct answer: A. Static equilibrium

1. The body neither moves nor rotates. 2. That state is judged in one chosen frame. 3. It is static equilibrium. _Source: OpenStax University Physics Volume 1, Chapter 12, Static Equilibrium and Elasticity._

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A body at rest for one observer may be moving steadily for another because motion is:

  1. Restricted
  2. Relative
  3. Reversible
  4. Repeatable
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Correct answer: B. Relative

1. Two observers can disagree about being at rest. 2. Each judgement depends on the frame used. 3. So motion is relative. _Source: OpenStax University Physics Volume 1, Chapter 12, Static Equilibrium and Elasticity._

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The first condition of equilibrium requires that the net external force be:

  1. Exactly zero
  2. Very large
  3. Straight up
  4. Ever growing
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Correct answer: A. Exactly zero

1. Any unbalanced force would accelerate the body. 2. Equilibrium forbids that acceleration. 3. So the net force must be exactly zero. _Source: OpenStax University Physics Volume 1, Chapter 12, Static Equilibrium and Elasticity._

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