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AP Physics 1 Unit 4A: Linear Momentum and Impulse — practice questions — page 2

Explore 92 free Unit 4A: Linear Momentum and Impulse questions in AP Physics 1 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 4A: Linear Momentum and Impulse questions and exercises with answers

Showing questions 31–60 of 92.

A force applied to a door produces a counterclockwise torque, so the door will:Read the answer and worked solution →A system is in stable equilibrium when a displacement produces a force or torque directed:Read the answer and worked solution →A system is in unstable equilibrium when a displacement produces a force or torque directed:Read the answer and worked solution →A marble at the bottom of a bowl, when displaced, experiences a:Read the answer and worked solution →The distance used in a torque calculation is described as the perpendicular distance from the pivot to:Read the answer and worked solution →A smaller force acting at the same distance from the hinges produces a torque that is:Read the answer and worked solution →In the seesaw analysis, the distances used are measured to points directly below each child's:Read the answer and worked solution →A system that stays balanced while rotating at constant angular velocity satisfies:Read the answer and worked solution →A ball balanced on top of a dome is displaced slightly. This equilibrium is:Read the answer and worked solution →Which describes a ball resting on a flat horizontal floor?Read the answer and worked solution →Doubling the perpendicular lever arm while keeping the force the same changes torque to:Read the answer and worked solution →For a nail puller, the mechanical advantage is:Read the answer and worked solution →A rigid bar has zero net force but a nonzero net torque. The bar is:Read the answer and worked solution →Stop on the right equilibriumRead the answer and worked solution →Match each statics termRead the answer and worked solution →True or false: statics and torqueRead the answer and worked solution →Tap what each condition needsRead the answer and worked solution →Complete the equilibrium rulesRead the answer and worked solution →Density is defined as the mass of a substance per unit:Read the answer and worked solution →The SI unit for pressure is the:Read the answer and worked solution →Density is described as crucial for determining whether an object in a fluid will:Read the answer and worked solution →Pressure relative to atmospheric pressure is defined as:Read the answer and worked solution →Absolute pressure is the sum of atmospheric pressure and:Read the answer and worked solution →Attractive forces between molecules of the same type are called:Read the answer and worked solution →Attractive forces between molecules of different types are called:Read the answer and worked solution →Cohesive forces cause a liquid's surface to contract to the smallest possible:Read the answer and worked solution →A swimmer floats because the forces underneath are larger. This is due to:Read the answer and worked solution →Archimedes' principle relates the buoyant force to the weight of:Read the answer and worked solution →If the buoyant force exceeds an object's weight, the object will:Read the answer and worked solution →The buoyant force is described as always present whether an object floats, sinks or is:Read the answer and worked solution →

Worked practice questions

A force applied to a door produces a counterclockwise torque, so the door will:

  1. Rotate clockwise only
  2. Move in a straight line
  3. Stay perfectly still
  4. Rotate counterclockwise
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Correct answer: D. Rotate counterclockwise

1. Torque has a rotational sense, just as force has a direction. 2. Counterclockwise torque is produced by the force in the figure. 3. That means the door will rotate counterclockwise. 4. A smaller force at the same distance produces a smaller counterclockwise torque. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 9 'Statics and Torque', sections 9.1-9.5_

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A system is in stable equilibrium when a displacement produces a force or torque directed:

  1. Opposite the displacement
  2. Along the displacement
  3. At right angles to it
  4. Nowhere in particular
Show answer and solution

Correct answer: A. Opposite the displacement

1. Stability is judged by which way the system is pushed after a nudge. 2. A system is said to be in stable equilibrium under one condition. 3. When displaced from equilibrium, it experiences a net force or torque. 4. That force or torque acts in a direction opposite to the direction of the displacement. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 9 'Statics and Torque', sections 9.1-9.5_

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A system is in unstable equilibrium when a displacement produces a force or torque directed:

  1. Nowhere in particular
  2. Along the displacement
  3. Opposite the displacement
  4. At right angles to it
Show answer and solution

Correct answer: B. Along the displacement

1. Unstable equilibrium is the mirror image of stable equilibrium. 2. A system is in unstable equilibrium if, when displaced, it experiences a net force or torque. 3. That force or torque acts in the same direction as the displacement from equilibrium. 4. So the displacement grows instead of being undone. _Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 9 'Statics and Torque', sections 9.1-9.5_

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More Physics topics

Unit 8: Fluids: Density, Buoyancy and ContinuityUnit 1B: Kinematics: 2D Motion & ProjectilesUnit 1C: Kinematics: Relative & Circular MotionUnit 2A: Newton's Laws and Translational EquilibriumUnit 2B: Friction, Gravitational and Normal ForcesUnit 3A: Work and Kinetic Energy TheoremUnit 3B: Potential Energy & Conservation of EnergyUnit 4B: Conservation of Linear Momentum & Collisions